If two ratios a : b and c : d are equal, they are said to be in proportion. How do you represent this symbolically?

a : b : c : d

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a : b :: c : d

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a : c = b : d

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a = b = c = d

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Solution

The correct option is B a : b :: c : d
If two ratios a:b and c:d are equal, they are said to be in proportion. This is represented as follows:
a : b :: c : d

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Similar questions

∣ ∣ ∣ ∣ ∣ ∣ \begin{matrix} a & b & c & d b & a & d & c c & d & a & b d & c & b & a \end{matrix} ∣ ∣ ∣ ∣ ∣ ∣ = (a + b + c + d) (a - b + c - d) (a - b - c + d) (a + b - c - d)

If (a + b +c + d) (a -b- c+ d)

=(a + b- c- d) (a -b+c- d);

prove that : a : b =c : d.

a, b, c, d A, B, C, D ϵ R^{*}

\frac{A}{a} = \frac{B}{b} = \frac{C}{c} = \frac{D}{d}

\frac{\sqrt{a A} + \sqrt{b B} + \sqrt{c C} + \sqrt{d D}}{\sqrt{a + b + c + d} \sqrt{A + B + C + D}}

Why is ab+bc+cd+da a monomial?

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