Question

If a, b, c and d are in proportion, then​

Answer 1

Answer:

ac = bd. ab = cd. ad = bc.

Answer 2

Proportionisequalityoftworatios.

Theratioof2to3issameastheratioof4to6,i.e.


2:3=4:6

Therefore,thetworatios2:3and4:6areproportionateandwrittenas:

2:3::4:6andreadas

Theratioof2to3issameasthatof4to6.


If2:3=4:6,then

2×6=3×4,i.e.12=12,

Lettworatiosa:bandc:dbeproportionate,

i.e.a:b::c:d

Intheproportiona:b::c:d

Productofmeans=productofextremes.

Ifa:b=c:d,then

a×d=b×c