Ratio and proportion (merged)

[adamnamsole]

How do I answer questions a, b, c & d
Can I please get some help.

 

[Dr.Peterson]

Write a proportion, e.g. height:arm = 160:x = 2.9:1, or whatever.

 

[Steven G]

a) 40:14 now multiply both numbers by 4 to get 160:56. So a 160cm woman has arms that are 56cm long.

Now you try the rest.

 

[adamnamsole]

a) 40:14 now multiply both numbers by 4 to get 160:56. So a 160cm woman has arms that are 56cm long.

Now you try the rest.

How did you know to multiply by 4 and where did you get 14 from?

 

[Steven G]

You were given 40:14 and you want 160:?

It just happens that when you multiply 40 by 4 you get the 160 which you want.