adj.
VERBS
▪ be
ADVERB
▪ approximately , roughly
▪
The amount of food a child needs is roughly ~ to her size.
▪ directly
▪
The speed of the glider is directly ~ to the speed of the wind.
▪ inversely
▪
The amount of force needed is inversely ~ to the rigidity of the material.
PREPOSITION
▪ to
Proportional is used with these nouns: ↑ increase , ↑ representation