Reducing the constant factor in a geometric progression will reduce the steepness of the upward curvature by that factor.
Work Step by Step
Note that the rise in the graph for a geometric progression increases from point-to-point. It accelerates based on the constant factor. A smaller constant factor would lead to less acceleration. Also, note that Malthus, and his followers like Paul Ehrlich, have been shown by history to have been quite wrong about the human growth curve as it relates to the human food production curve.