Alright here we go:
First, you would need to do a little cross multiplication/division.
(X is the segment we’re looking for)
You would put 1.5/2.25 and then 1.4/x. After that, multiply 2.25x1.4 to get 3.15. After that divide 3.15 by 1.5 to complete the cross multiplication, getting you 2.1.
So there is your answer, 2.1! I really hope that’s right!
Work wise it should look something like the picture attached, sorry if it’s messy.