Pythagorean formula question of sorts with B related to length of A

I am a non-math person with a math question. Suppose you have an Pythagorean formula, but there is a known relationship in length between A and B. So:

Given that A = A and B = (0.75A) . . . your formula is:

A(squared) + 0.75A(squared) = 361 or 19(squared)

Can you solve this, since you now only have one unknown, A? and if so, could you show me the steps to get there? Thanks, D

Re: Pythagorean formula question of sorts with B related to length of A

Re: Pythagorean formula question of sorts with B related to length of A

Thanks Mark. I don't follow how you got from the first line (which is just restating my question) to the second, which includes (1 + 9/16). Where the heck did the 1 come from? But actually, the final equation works and can be used with other numbers, so understanding step two is only a curiousity for me now. David

Quote:

Originally Posted by

**MarkFL2**

Re: Pythagorean formula question of sorts with B related to length of A

Both terms on the left side have as a factor, perhaps if you put this in between the first and second lines:

It is more clear now that when we factor out the we get the second line of my first post.

Re: Pythagorean formula question of sorts with B related to length of A

Mark, I don't really get it, but that's okay, since it works.

If I was to use another fraction to multiply A by, for example B = 5/8A, I assume that I could still use your formula, only the second step would be:

Asq (1 + 25/64) = C sq

Is that correct? I get this by squaring each number of the fraction 5/8 which gives me the 25/64. I assume that's what you do to get to the fraction in the second step, but that's only a guess. Thanks again, David.

Re: Pythagorean formula question of sorts with B related to length of A