Home / 102.75-217.13

Finding the Third Proportional to 102.75 and 217.13

Calculator

Solution

The third proportional to 102.75 and 217.13 is: 458.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.75 : 217.13 = 217.13 : x
  2. Step 2: Convert to fraction form
    102.75/217.13 = 217.13/x
  3. Step 3: Cross multiply
    102.75x = 217.13 × 217.13
  4. Step 4: Simplify right side
    102.75x = 47,143.27
  5. Step 5: Solve for x
    x = 47,143.27/102.75
  6. Step 6: Final answer
    x = 458.82

Related Problems

Find third proportional to 51.38 and 108.56
Half scale
Find third proportional to 205.50 and 434.25
Double scale
Find third proportional to 105 and 221
Similar ratio
Find third proportional to 154.13 and 325.69
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.