college math 1012 question

Question

The scale on a map is drawn so that  inches corresponds to an actual distance of  miles. If two cities are  inches apart on the map, how many miles apart are they? (Round to the nearest tenth)

Answer 1

The ratios of inches to miles must be equivalent. We can write an equation setting the ratios (as fractions) equal to each other, using x as the unknown # of miles:

5.5/425 = 10.75/x

Solve for x