How do you write 1 is to 2 as 5 is x as a proportion in fractional notation?

Question

A. 1 : 2 = 5 : x
B. 1 : 3 :: 5 : x
C. 2/1 = 5/x
D. 1/2 = 5/x

Answer 1

To express the relationship "1 is to 2 as 5 is to x" in fractional notation, we can write it as a proportion.

The correct way to express the proportion in fractional notation is:

A. 1 : 2 = 5 : x

In fractional form, this can also be represented as:

\(\frac{1}{2} = \frac{5}{x}\)

Thus, the equivalent option from the provided answers, while originally phrased differently, aligns with:

D. \( \frac{1}{2} = \frac{5}{x} \)

So both A and D are correct answers, but if you had to choose based purely on traditional fraction notation, the best answer is D.

Thus, D. 1/2 = 5/x is the most direct representation of the proportion in fractional notation.