 But the Fourteenth Amendment dramatically increased the apportionment population of the Southern states because the black population counted fully instead of being reduced to three-fifths its numbers.As a result, a major increase in seats was needed to keep about the same number of seats in the northern states and the House was enlarged by 50 seats (21%) in respect of the 1870 census.The reapportionment of 1872 created a house size of 292.