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Finding the Third Proportional to 285.38 and 616.31

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Solution

The third proportional to 285.38 and 616.31 is: 1,331.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.38 : 616.31 = 616.31 : x
  2. Step 2: Convert to fraction form
    285.38/616.31 = 616.31/x
  3. Step 3: Cross multiply
    285.38x = 616.31 × 616.31
  4. Step 4: Simplify right side
    285.38x = 379,841.10
  5. Step 5: Solve for x
    x = 379,841.10/285.38
  6. Step 6: Final answer
    x = 1,331.02

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.