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.<br /><br />Cross-multiplying the given ratio, we have:<br /><br />$4 \times 10 = 5 \times 8$<br /><br />Simplifying the products, we get:<br /><br />$40 = 40$<br /><br />Since the products are equal, the given ratio forms a proportion.<br /><br />Therefore, the answer is Yes.