If you would like to know which proportion can be used to find the distance on the map that represents 50 miles, you can calculate this using the following steps:
200 miles ... 5 inches
50 miles ... x inch = ?
200 * x = 5 * 50
x = 5 * 50 / 200
x = 1.25 inch
The correct result would be x = 5 * 50 / 200.
