Editing Highest averages method (section)

=== Huntington–Hill method ===
{{Main article|Huntington–Hill method}}
In the [[Huntington–Hill method]], the signpost sequence is {{Math|1=post(''k'') = {{sqrt|''k'' (''k''+1)}}}}, the [[geometric mean]] of the neighboring numbers. Conceptually, this method rounds to the integer that has the smallest [[Relative change#Logarithmic change|relative (percent) difference]]. For example, the difference between 2.47 and 3 is about 19%, while the difference from 2 is about 21%, so 2.47 is rounded up. This method is used for allotting seats in the US House of Representatives among the states.<ref name="Pukelsheim-2017-1" />

The Huntington-Hill method tends to produce very similar results to the Webster method, except that it guarantees every state or party at least one seat (see {{Section link|2=Zero-seat apportionments}}). When first used to assign seats in the [[US House of Representatives|House]], the two methods produced identical results; in their second use, they differed only in assigning a single seat to [[Michigan]] or [[Arkansas]].<ref name="Balinski-1982" />{{Rp|58}}