Add one of the three numbers 2,5,1 / 3 to form a proportion and write down all possible situations

Add one of the three numbers 2,5,1 / 3 to form a proportion and write down all possible situations

2 :5 = 1/3 :(5/6),2 :5 = (2/15) :1/3,2 :(2/15) = 5 :1/3,(30) :2 = 5 :1/3