Find the​ distance, d, across the river. Assume that the ratio of d to 150 ft is the same as the ratio of 120 ft to 40 ft.

Answer 1

d / 150 = 120/40 = 12/4 = 3
multiply both sides by 150
d = 3 * 150

Answer 2

Its 450 feet

Answer 3

Agreed :)