To determine if two ratios are proportional are 2 methods Method 1 Find common denominators Method 2 Use cross products – – Ex 1 Ex 2 15 _____ = 12 _____ ∙ ∙ _________ = _________ Yes they are No they are not proportional proportional GroupWork Determine if the ratios are proportional ; 1) 4:7 ; 24 to 35 2) 33 to 36 ; ; 3) 4) 80:144 5) 10 to 15 ; 2 to 3 6) 9:13 ;
To determine if two ratios are proportional are 2 methods Method 1 – Find common denominators Method 2 – Use cross products Ex 1 Ex 2 15 ∙ _____ = 12 ∙ _____ _________ = _________ Yes they are No they are not proportional proportional GroupWork Determine if the ratios are proportional 1) 4:7 ; 24 to 35 2) ; 33 to 36 3) ; 4) ; 80:144 5) 10 to 15 ; 2 to 3 6) 9:13 ;
Ratios%20Rates%202014.docx