Cross-multiply to see if the ratio forms a proportion Select Yes if it forms a proportion and No it it does not. (4)/(5)=(8)/(10) No Yes

To determine if the given ratio forms a proportion, we need to cross-multiply and check if the products are equal.Cross-multiplying the given ratio, we have: Simplifying the products, we get: Since the products are equal, the given ratio forms a proportion.Therefore, the answer is Yes.