240 x 257 = 61680 and 120 x 128.5 = 15420
120 CALORIES
= 257 ml
240 ml
128.5 CALORIES
This is not a proportion because 240 x 257 does not equal 120 x 128.5 and notice that one numerator is measured in calories and the other in ml. This would be a proportion if you inverted one of the ratio fractions. Then both numerators would be in the same measurement and both denominators would be in the same measurement and cross multiplying would prove that the equality is a proportion. The following are proportions:
240 ml
= 257
ml
120 CALORIES 125.5 CALORIES
120 CALORIES
= 128.5 CALORIES
240 ml 257 ml