Where does “päätöslasku” come from?

päätöslasku (Finnish) comes from Finnish päätös, from Finnish päättää, from Finnish pää, from Proto-Finnic pää, from Proto-Uralic päŋe — head.

päätöslasku (Finnish): a calculation involving the mathematical rule of three (form of cross-multiplication)

Definitions

  1. a calculation involving the mathematical rule of three (form of cross-multiplication)

Ancestry of “päätöslasku”, step by step

päätöslasku traces back through two separate lines of ancestry.

via Finnish päätös

StepLanguageWordMeaning
1Finnishpäätösdecision; resolution; ending
2Finnishpäättääto end, conclude, terminate, finish, bring to a close
3Finnishpäähead; end, tip
4Proto-Finnicpäähead
5Proto-Uralicpäŋehead

via Finnish lasku

StepLanguageWordMeaning
1Finnishlaskudescent, an instance of descending, sliding down...
2Voticlaskõato let go, let loose, release
3Proto-Finniclaskedakto drop, to fall; to release; to let, to allow
4Proto-Uraliclaćke-—
Every word from Proto-Uralic päŋe →Every word from Proto-Finnic pää →Every word from Finnish pää →