The weight of an object on Venus varies directly with his or her weight on Earth. An object weighing 200 pounds on Earth weighs 180 pounds on Venus. How much would an object weighing 250 pounds on Earth weigh on Venus?
Proportion:
200 / 180 = 250 / x
Cross multiply:
200 x = 180 ∙ 250
200 x = 45 000
x = 45 000 / 200 = 225 pounds
OR
weighs on Venus / weighs on Earth = 180 / 200 = 0.9
x = 0.9 ∙ 250 pounds = 225 pounds