And that's not baked into the Constitution—it was set by law in the early 1900s, and could be changed by law.

If we were to uncap the size of the House of Representatives, and instead change so that each district contains 50k people (or close to it), we would have roughly 7k representatives in the House.

That would effectively eliminate the disproportionate advantage small states have there. (It would not, of course, do anything about the Senate; that would have to be addressed separately.)