If you want population-proportional representation in the HoR, get their dumb asses to unlock the 435 limit and set it per-X-residents with no fixed number of representatives (only the ability to change "X" in that calculation when every state has a minimum population value for X). Currently, 1 representative per 700k residents is just about right (300M / 700k = 428-ish). Alaska has just above 700k residents, and North Dakota, Vermont, and Wyoming have a bit less, but could have 1 representative each anyway.
Agree in principle, but your representative counts are way, way off. The 435 limit was set in 1911 for the 63rd Congress, and followed that up in 1929 with the "Permanent Apportionment Act", because they couldn't get their shit together and fulfill one of their obligations (which was to properly re-apportion, including ADDING OR SUBTRACTING seats based on the census results). Kinda like today - you had members of Congress playing the anti-immigrant card as hard as they could, and in the process, really broke things for us a hundred years later.
Anyway, the US population after the 1910 census was a bit over 92 million (92,228,496) giving a population to representative of ~212k. If we were to maintain even a remotely similar representation, we would be looking at a HoR with ~1456 members, with the least populous state (Wyoming) having 2 representatives - which is, interestingly enough, directly in line with Madison's original Bill of Rights proposal for Article the First, which explicitly set the minimum number of reps per state at 2 after crossing the 30k per rep line, and setting 30k per rep as the hard line for the number of representatives in the HoR (which would have today's HoR be 10,300 and change)
Hell - I'd be okay with setting the reps per population to, on average, be roughly equivalent to smallest state population divided by 2, until such time as that's back up to, say, 350k, after which it becomes divisible by +1. That would mean that, should Wyoming's population reach 700k, we would, instead of dividing their population by 2 to get the population per rep (and the total number of reps from there). This would allow for the HoR to increase in membership still relatively infrequently, but unlikely to stay static for a century as it has, largely due to incompetence.