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Finding the Third Proportional to 285.41 and 614.91

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Solution

The third proportional to 285.41 and 614.91 is: 1,324.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.41 : 614.91 = 614.91 : x
  2. Step 2: Convert to fraction form
    285.41/614.91 = 614.91/x
  3. Step 3: Cross multiply
    285.41x = 614.91 × 614.91
  4. Step 4: Simplify right side
    285.41x = 378,109.70
  5. Step 5: Solve for x
    x = 378,109.70/285.41
  6. Step 6: Final answer
    x = 1,324.79

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.