Earlier quoted context omitted.
That's exactly the point of the Senate. The House is supposed to be the proportional one.
No, the House isn't proportional. There is a minimum of one House member per State: each State shall have at Least one Representative . At 321.4 million / 435 = 738850. Wyoming wouldn't even get a House member. Vermont wouldn't either.
"The U.S. Constitution called for at least one Representative per state and that no more than one for every 30,000 persons." [1]
The Appointment Act of 1911 and subsequent Permanent Appointment Act of 1929 capped the total number of House congressional representatives at 435 [2], so the degree of seperation between an individual elector and their representative in any given congressional district continues to grow as population increases. This also has an effect on the Electoral College, as it's membership numbers are based on the number of congress persons. Furthermore, I will assume this limit, combined with a growing population will increase the chances of a Presidential Candidate winning election without also winning the national popular vote, as we have seen on multiple occasions in recent decades.
[1] http://history.house.gov/Historical-Highlights/1901-1950/The....
[2] https://en.m.wikipedia.org/wiki/Reapportionment_Act_of_1929