Question

b. Are 30, 40, 45, 60 in proportion​

Answer 1

Step-by-step explanation:

30:40::45:60

30*60::40*45

1800::1800

hence it is in proportion

hope this answer is helpful for you

Answer 2

Answer:

Hope it will help you

Step-by-step explanation:

Ratio of 30 to 40 = 3:4

Ratio of 45 to 60 = 3:4 .

Therefore , 30 , 40 , 45 and 60 are in proportion