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Finding the Third Proportional to 568.13 and 721.69

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Solution

The third proportional to 568.13 and 721.69 is: 916.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.13 : 721.69 = 721.69 : x
  2. Step 2: Convert to fraction form
    568.13/721.69 = 721.69/x
  3. Step 3: Cross multiply
    568.13x = 721.69 × 721.69
  4. Step 4: Simplify right side
    568.13x = 520,832.85
  5. Step 5: Solve for x
    x = 520,832.85/568.13
  6. Step 6: Final answer
    x = 916.76

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.