Answer
Unless birth rates were checked or wars and disease raised the death rate, he said, England and the rest of world would face inevitable famine and a subsistence standard of living. Malthus' predictions never came true.
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.