Present Population given Future Population from Geometrical Increase Method Calculator

✖Forecasted Population is the population forested usually after n decade or after n years.ⓘ Forecasted Population [P_n]			+10% -10%
✖Average % Growth Rate in the geometric increase method is usually found by the arithmetic mean or geometric mean which is the maximum.ⓘ Average % Growth Rate [r]			+10% -10%
✖Number of Decades is the year gap of 10 years. Usually, 10 years is equal to 1 decade.ⓘ Number of Decades [n]			+10% -10%

✖Last Known Population is the population of any area of the previous year or decade.ⓘ Present Population given Future Population from Geometrical Increase Method [P_o]

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Present Population given Future Population from Geometrical Increase Method Solution

STEP 0: Pre-Calculation Summary

Formula Used

Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^Number of Decades
P_o = P_n/(1+(r/100))^n
This formula uses 4 Variables

Variables Used

Last Known Population - Last Known Population is the population of any area of the previous year or decade.
Forecasted Population - Forecasted Population is the population forested usually after n decade or after n years.
Average % Growth Rate - Average % Growth Rate in the geometric increase method is usually found by the arithmetic mean or geometric mean which is the maximum.
Number of Decades - Number of Decades is the year gap of 10 years. Usually, 10 years is equal to 1 decade.

STEP 1: Convert Input(s) to Base Unit

Forecasted Population: 350000 --> No Conversion Required
Average % Growth Rate: 12.82 --> No Conversion Required
Number of Decades: 2 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_o = P_n/(1+(r/100))^n --> 350000/(1+(12.82/100))^2

Evaluating ... ...

P_o = 274976.673335977

STEP 3: Convert Result to Output's Unit

274976.673335977 --> No Conversion Required

FINAL ANSWER

274976.673335977 ≈ 274976.7 <-- Last Known Population

(Calculation completed in 00.006 seconds)

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Created by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

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Verified by Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

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< Geometric Increase Method Calculators

Average Percentage Increase given Future Population from Geometrical Increase Method

LaTeX Go Average % Growth Rate = ((Forecasted Population/Last Known Population)^(1/Number of Decades)-1)*100

Present Population given Future Population from Geometrical Increase Method

LaTeX Go Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^Number of Decades

Future Population at End of n Decades in Geometrical Increase Method

LaTeX Go Forecasted Population = Last Known Population*(1+(Average % Growth Rate/100))^Number of Decades

Future Population at End of 2 Decades in Geometrical Increase Method

LaTeX Go Forecasted Population = Last Known Population*(1+(Average % Growth Rate/100))^2

Present Population given Future Population from Geometrical Increase Method Formula

LaTeX Go

Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^Number of Decades
P_o = P_n/(1+(r/100))^n

What is Population Forecasting and Methods Involved?

Population forecasting is defined as the method of determining the expected population for a particular design period of a water supply system with the help of the study and analysis of future events and available records.
Methods are
1. Arithmetic Increase Method
2. Geometric Increase Method
3. Incremental Increase Method
4. Decrease Growth Rate Method
5. Logistic Curve Method
6. Demographic Method
7. Simple Graphical Method
8. Comparative Graphical Method
9. Master Plan Method
10. Ratio Method

What is Geometric Increase Method?

In this method, the per-decade percentage increase or percentage growth rate (r) is assumed to be constant, and the increase is compounded over the existing population every decade.
It is also known as the uniform increase method.

How to Calculate Present Population given Future Population from Geometrical Increase Method?

Present Population given Future Population from Geometrical Increase Method calculator uses Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^Number of Decades to calculate the Last Known Population, The Present Population given Future Population from Geometrical Increase Method formula is defined as the present population when we have prior information on other parameters used. Last Known Population is denoted by P_o symbol.

How to calculate Present Population given Future Population from Geometrical Increase Method using this online calculator? To use this online calculator for Present Population given Future Population from Geometrical Increase Method, enter Forecasted Population (P_n), Average % Growth Rate (r) & Number of Decades (n) and hit the calculate button. Here is how the Present Population given Future Population from Geometrical Increase Method calculation can be explained with given input values -> 274976.7 = 350000/(1+(12.82/100))^2.

FAQ

What is Present Population given Future Population from Geometrical Increase Method?

The Present Population given Future Population from Geometrical Increase Method formula is defined as the present population when we have prior information on other parameters used and is represented as P_o = P_n/(1+(r/100))^n or Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^Number of Decades. Forecasted Population is the population forested usually after n decade or after n years, Average % Growth Rate in the geometric increase method is usually found by the arithmetic mean or geometric mean which is the maximum & Number of Decades is the year gap of 10 years. Usually, 10 years is equal to 1 decade.

How to calculate Present Population given Future Population from Geometrical Increase Method?

The Present Population given Future Population from Geometrical Increase Method formula is defined as the present population when we have prior information on other parameters used is calculated using Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^Number of Decades. To calculate Present Population given Future Population from Geometrical Increase Method, you need Forecasted Population (P_n), Average % Growth Rate (r) & Number of Decades (n). With our tool, you need to enter the respective value for Forecasted Population, Average % Growth Rate & Number of Decades and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Last Known Population?

In this formula, Last Known Population uses Forecasted Population, Average % Growth Rate & Number of Decades. We can use 2 other way(s) to calculate the same, which is/are as follows -

Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^2
Last Known Population = Forecasted Population/(1+(Average % Growth Rate/100))^3

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