No, you do not capitalize "is" after "!" unless you are forming a new and complete sentence.
Do not capitilize:
"Hello!" is okay to say.
Capitilize:
"Hello!" Is she okay, she has never greeted us before...
(Pro) = (scale or proportion) * (Youth) this formula could be used to find the difference in the fields. if they are directly proportional then it means that the fields are similar polygons.
