the ratio of three numbers is 5 : 1 : 4 and their sum is 1000 . the last number of the three numbers is ?
"5 : 1 : 4 total parts = 10 10 parts - - > 1000 1 part - - - - > 100 the last number of the three numbers is = 4 * 100 = 400 answer : d"
sqrt(divide(1000, add(power(4, 1), add(power(5, 1), power(1, 1)))))