Can I say it like this?

[KLPNO]

Hello everyone

I'd like to ask if I can phrase the sentence like this:

Wage growth is projected to be proportionate to the wage index in Russia and changes in the ruble to dollar rate.

The part I'm not sure of is "is projected to be proportionate to." The intended meaning is as follows: it's forecasted/expected that if wage index increases, wage growth also increases, wage index decreases, wage growth decreases as well. The same pattern is with "wage growth" and "changes in the ruble to dollar rate." Ruble is the currency used in Russia.

[Mister Micawber]

.
It's Ok, but you could do better:

Wages are projected to grow in proportion to the Russian wage index and ruble-to-dollar rate changes.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber

[KLPNO]

Thank you very much, Mister Micawber!