Question

найдите неизвестный член пропорции: a)3 25:х=6 45:1 13  б)7 1/3:2 1/2= 3 2/3:y   В)4 2/5:x=8 4/5:2 1/5 Г) 6 1/2: 3 3/4= 3 1/4:y

Answer 1

$a);3frac25:x=6frac45:1frac13\frac{17}5:x=frac{34}5:frac43\x=frac{17}5cdotfrac43:frac{34}5=frac{17}5cdotfrac43cdotfrac5{34}=frac4{3cdot2}=frac46=frac23\ b);7frac13:2frac12= 3frac23:y\frac{22}3:frac52=frac{11}3:y\y=frac{11}3cdotfrac52:frac{22}3=frac{11}3cdotfrac52cdotfrac3{22}=frac5{2cdot2}=frac54=1frac14$
$\c);4frac25:x=8frac45:2frac15\frac{22}5:x=frac{44}5:frac{11}5\x=frac{22}5cdotfrac{11}5:frac{44}5=frac{22}5cdotfrac{11}5cdotfrac5{44}=frac{11}{5cdot2}=frac{11}{10}=1frac1{10}=1,1\d);6frac12:3frac34=3frac14:y\frac{13}2:frac{15}4=frac{13}4:y\y=frac{13}4cdotfrac{15}4:frac{13}2=frac{13}4cdotfrac{15}4cdotfrac2{13}=frac{15}{4cdot2}=frac{15}8=1frac78$