From the base price level of $100$ in $1974,$ Swiss and Canadian price levels in $2020$ stood at $240$ and $461,$ respectively.

If the $1974$ $$/$Sf exchange rate was $$0\mathrm{.}48/$Sf$,$ what should the exchange rate be in $2020?($Do not round intermediate calculations. Round the final answer to $3$ decimal places. Omit $ sign in your response.$)$

Exchange rate $