"factor of proportionality"@en-us . . . "0"^^ . . "112828211"@en-us . . . . "constant of proportionality"@en-us . . "113593634"^^ . "factor of proportionality"^^ . . . "0"^^ . . "the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality"@en-us . . "13593634-n"^^ . .