Answer :
2 inches / 25 miles = 31 inches / x
Cross-multiply the proportion:
2x inch-miles = 775 inch-miles
Divide each side by 2 inches:
x miles = 775/2 = 387.5 miles
Cross-multiply the proportion:
2x inch-miles = 775 inch-miles
Divide each side by 2 inches:
x miles = 775/2 = 387.5 miles