The distance between the two islands shown on the map is 210 miles. a ruler measures the distance on the map is three 1/2 inches how many miles would be represented by one 3/4 inches on the map?

210 miles equals 1 and 1/2 inches (3 1/2"s or 0.5"). 1 and 1/2" is equal to two 3/4" (3/4 + 3/4 = 1 and 1/2). 1.5" is equal to 210 miles, and 1.5" is equal to 2 * .75", you can divide 210 miles by two, which gives you 105 miles.