How do I create a feedback to adjust variables based on error sum

Hey, I'm working on a script where an error sum is determined by 2 divisors. At the moment I've played around a bit and found the divisors by trial and error to get a feel for the ratio, which means there's always some residue error. They currently sit at 3.63 and 1.36 with very little error, but there must be a perfect combination with no error.

From here my initial thought was to run multiple iterations of the script trying all combinations between 0 and 6, but I'm fairly certain matlab must have some clever built-in functions to do it smarter.

So essentially I would like a feedback of some sort to adjust div1 and div2 in a way that the error sum becomes 0.

Example code of how it looks now:

X_tar = 6;
Y_tar = 50;

div1 = 3.63;
div2 = 1.36;

... various equations being run in a for-loop using div1 and div2, storing each result in vectors X and Y

X_tot = sum(X);
Y_tot = sum(Y);

X_err = sqrt((X_tot - X_tar).^2);
Y_err = sqrt((Y_tot - Y_tar).^2);