Worksheet on Mean Proportional

Practice the questions given in the worksheet on mean proportional.

1. Find the mean proportional of the following sets of positive numbers:

(i) x$^{3}$y, xy$^{3}$

(ii) (x - y)$^{2}$, (x + y)$^{3}$

2. Find the mean proportional of the following:

(i) 9, 16

(ii) 4$\frac{4}{7}$, 3$\frac{1}{2}$

(iii) (a + b)(a - b)$^{3}$, (a + b)$^{3}$(a - b)

(iv) $\frac{x^{2}}{4ab}$, $\frac{a}{by^{2}}$

3. Find the mean proportional between

(i) 5 and 45

(ii) 0.04 and 0.0036

(iii) 0.25 and 6.25

4. Find the third proportional of the following:

(i) 0.5, 0.25

(ii) a$^{2}$b, ab$^{2}$

(iii) $\frac{x}{y}$ + $\frac{y}{x}$, $\frac{x}{y}$

5. (i) If the mean proportional of a and c is b then prove that a, c, a$^{2}$ + b$^{2}$ and b$^{2}$ + c$^{2}$ are proportional.

(ii) If b is the mean proportional of a and c, prove that the mean proportional of a$^{2}$ + b$^{2}$ and b$^{2}$ + c$^{2}$ is ab + bc.

(iii) If b is the mean proportional of a and c, prove that

$$\left ( \frac{ab + bc + ca}{a + b + c} \right )^{3} = abc$$

Answers for the worksheet on mean proportional are given below.

Answers

1. (i) x$^{2}$y$^{2}$

(ii) x$^{2}$ - y$^{2}$

2. (i) 12

(ii) 4

(iii) $(a^{2} - b^{2})^{2}$

(iv) $\frac{x}{2by}$

3. (i) 15

(ii) 0.012

(iii) 1.25

4. (i) 0.125

(ii) b$^{3}$

(iii) $\frac{x^{3}}{y(x^{2} + y^{2})}$

● Ratio and proportion

• Basic Concept of Ratios
• Important Properties of Ratios
• Ratio in Lowest Term
  
• Types of Ratios
• Comparing Ratios
• Arranging Ratios
  
• Dividing into a Given Ratio
  
• Divide a Number into Three Parts in a Given Ratio
• Dividing a Quantity into Three Parts in a Given Ratio
  
• Problems on Ratio
  
• Worksheet on Ratio in Lowest Term
  
• Worksheet on Types of Ratios
  
• Worksheet on Comparison on Ratios
• Worksheet on Ratio of Two or More Quantities
  
• Worksheet on Dividing a Quantity in a Given Ratio
• Word Problems on Ratio
  
• Proportion
  
• Definition of Continued Proportion
  
• Mean and Third Proportional
  
• Word Problems on Proportion
  
• Worksheet on Proportion and Continued Proportion
  
• Worksheet on Mean Proportional
  
• Properties of Ratio and Proportion

10th Grade Math

From Worksheet on Mean Proportional to HOME PAGE