Question

Geometric method for population when two data is known

Answer 1

Geometrical Increase Method (GEOMETRICALPROGRESSION METHOD)  In this method the percentage increase in population from decade to decade is assumed to remain constant.  Geometric mean increase is used to find out the future increment in population.

Answer 2

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In the geometric method of projection, the formula is Pp = P1(1 + r)n where, Pp= Projected population; P1 = Population as per the recent census; r= Annual rate of increase or decrease of population; and n = Number of years. This formula is the basis of Malthus's population projection.