I have a triangle with side lengths of 2 cm, 3 cm, and 4 cm. If I have a second triangle that is similar that has a shortest side length of 4 cm, what is the longest side length?

So 2,3,4

another one is

4, x, y

the shortest is 2 and 4

4/2=2

2 time 2=4

the other triangle sides area obviously twice as large

2 times 2=4

2 times 3=6

2 times 4=8

the longest sides is 8 cm