6 miles to the gallon is the same as 6 miles for $3.61. So, 6 miles is to $3.61 as 490 miles is to $X "Is to" means "over" and "as" means "equals". So 6 miles OVER $3.61 EQUALS 490 miles OVER $X.6X = 490(3.61) 6X = 1768.9 X = X = $294.82 rounded to the nearestr penny. Edwin