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Finding the Third Proportional to 558.38 and 817.13

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Solution

The third proportional to 558.38 and 817.13 is: 1,195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.38 : 817.13 = 817.13 : x
  2. Step 2: Convert to fraction form
    558.38/817.13 = 817.13/x
  3. Step 3: Cross multiply
    558.38x = 817.13 × 817.13
  4. Step 4: Simplify right side
    558.38x = 667,693.27
  5. Step 5: Solve for x
    x = 667,693.27/558.38
  6. Step 6: Final answer
    x = 1,195.78

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.