Final answer:
To form a proportion with 2/3, set up the proportion 2/3 = x/y and cross-multiply to solve for x and y. Any ratio in the form (3/2)x/y will form a proportion with 2/3.
Step-by-step explanation:
A proportion is created when two ratios are found to be equivalent or equal. To form a proportion with 2/3, we need to find ratios that are equivalent to 2/3. Let's call the unknown ratio x/y. We can set up the proportion 2/3 = x/y and cross-multiply to solve for x and y.
2y = 3x
y = (3/2)x
So, any ratio in the form (3/2)x/y will form a proportion with 2/3.