Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method Solution

STEP 0: Pre-Calculation Summary
Formula Used
Last Known Population = Forecasted Population-2*Average Arithmetic Increase
Po = Pn-2*
This formula uses 3 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 Arithmetic Increase - Average Arithmetic Increase in population is the arithmetic sum of the population increase of the previous decade.
STEP 1: Convert Input(s) to Base Unit
Forecasted Population: 350000 --> No Conversion Required
Average Arithmetic Increase: 37500 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Po = Pn-2*X̄ --> 350000-2*37500
Evaluating ... ...
Po = 275000
STEP 3: Convert Result to Output's Unit
275000 --> No Conversion Required
FINAL ANSWER
275000 <-- Last Known Population
(Calculation completed in 00.004 seconds)

Credits

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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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Arithmetic Increase Method Calculators

Average Increment for n Decade given Future Population by Arithmetic Increase Method
​ LaTeX ​ Go Average Arithmetic Increase = (Forecasted Population-Last Known Population)/Number of Decades
Number of Decades given Future Population by Arithmetic Increase Method
​ LaTeX ​ Go Number of Decades = (Forecasted Population-Last Known Population)/Average Arithmetic Increase
Future Population at End of n Decades by Arithmetic Increase Method
​ LaTeX ​ Go Forecasted Population = Last Known Population+Number of Decades*Average Arithmetic Increase
Future Population at End of 2 Decades by Arithmetic Increase Method
​ LaTeX ​ Go Forecasted Population = Last Known Population+2*Average Arithmetic Increase

Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method Formula

​LaTeX ​Go
Last Known Population = Forecasted Population-2*Average Arithmetic Increase
Po = Pn-2*

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

Assumptions in Arithmetic Increase Method

1. The population increases at a constant rate i.e., the rate of change of population with time (dp/dt) is constant.
2. It is applicable to old and large cities.
3. This method yields lower results for rapidly growing cities.

How to Calculate Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method?

Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method calculator uses Last Known Population = Forecasted Population-2*Average Arithmetic Increase to calculate the Last Known Population, The Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method formula is defined as the present population when we have prior information of other parameters used. Last Known Population is denoted by Po symbol.

How to calculate Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method using this online calculator? To use this online calculator for Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method, enter Forecasted Population (Pn) & Average Arithmetic Increase (X̄) and hit the calculate button. Here is how the Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method calculation can be explained with given input values -> 275000 = 350000-2*37500.

FAQ

What is Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method?
The Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method formula is defined as the present population when we have prior information of other parameters used and is represented as Po = Pn-2*X̄ or Last Known Population = Forecasted Population-2*Average Arithmetic Increase. Forecasted Population is the population forested usually after n decade or after n years & Average Arithmetic Increase in population is the arithmetic sum of the population increase of the previous decade.
How to calculate Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method?
The Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method formula is defined as the present population when we have prior information of other parameters used is calculated using Last Known Population = Forecasted Population-2*Average Arithmetic Increase. To calculate Present Population given Future Population at End of 2 Decades by Arithmetic Increase Method, you need Forecasted Population (Pn) & Average Arithmetic Increase (X̄). With our tool, you need to enter the respective value for Forecasted Population & Average Arithmetic Increase 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 Arithmetic Increase. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Last Known Population = Forecasted Population-3*Average Arithmetic Increase
  • Last Known Population = Forecasted Population-Number of Decades*Average Arithmetic Increase
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