Home / 220.75-315.25

Finding the Third Proportional to 220.75 and 315.25

Calculator

Solution

The third proportional to 220.75 and 315.25 is: 450.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.75 : 315.25 = 315.25 : x
  2. Step 2: Convert to fraction form
    220.75/315.25 = 315.25/x
  3. Step 3: Cross multiply
    220.75x = 315.25 × 315.25
  4. Step 4: Simplify right side
    220.75x = 99,382.56
  5. Step 5: Solve for x
    x = 99,382.56/220.75
  6. Step 6: Final answer
    x = 450.20

Related Problems

Find third proportional to 110.38 and 157.63
Half scale
Find third proportional to 441.50 and 630.50
Double scale
Find third proportional to 223 and 318
Similar ratio
Find third proportional to 331.13 and 472.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.