IBPS Clerk Prelims Model Paper 20

Suppose the second & third numbers are 2x & 3x respectively.
ATQ,
5x × 6x = 4320
30 x2 = 4320
x2 = 144
x = 12
So, second number = 5x = 5 × 12 = 60
Third number = 6x = 6 × 12 = 72
Ratio of first & second number = 3⁄4
Hence, first number = (3⁄4)*60 = 45
Sum of these 3 numbers
= 60 + 72 + 45 = 177