Rhodeliamaytorresviz Rhodeliamaytorresviz Math Answered E. 1dentiry if the given ratios form a proportion or not. Dravwa check mark (/)if t is a proportion and a cross mark ( x ) if not. 21. 8:10=10:4522. 5/7=25=3523.2:18=10:6024.300/3=400/425.20:5=40:4