Answer:
661 pounds
Step-by-step explanation:
The ratio of heights of your hypothetical man and the average man is ...
109/70
Since you say the ratio of weights is the cube of this number, the weight of your hypothetical man would be ...
w/175 = (109/70)³
w = 175×(109/70)³ ≈ 660.73 ≈ 661 . . . pounds