Final answer:
The missing denominator in the proportion 3/30 = 5/( ) is found by cross-multiplying to get x = (5 x 30) / 3, which simplifies to x = 50. Hence, the missing denominator is 50.
Step-by-step explanation:
To find the missing denominator in the proportion 3/30 = 5/( ), we need to set up a proportional equation. We can do this by cross-multiplication:
3 / 30 = 5 / x
To solve for x, we cross-multiply to get:
3 × x = 5 × 30
x = (5 × 30) / 3
x = 150 / 3
x = 50
Therefore, the missing denominator is 50.