The fourth proportional to 2.5, 9.6 and 75 is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 288
Fourth proportional to x, y, z is w
x : y = z : w
2.5 : 9.6 = 75 : w
2.5 × w = 9.6 × 75
2.5 × w = 720
w = 720 ÷ 2.5
w = 288
Fourth proportional = 288