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Finding the Third Proportional to 400.75 and 637.38

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Solution

The third proportional to 400.75 and 637.38 is: 1,013.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.75 : 637.38 = 637.38 : x
  2. Step 2: Convert to fraction form
    400.75/637.38 = 637.38/x
  3. Step 3: Cross multiply
    400.75x = 637.38 × 637.38
  4. Step 4: Simplify right side
    400.75x = 406,246.89
  5. Step 5: Solve for x
    x = 406,246.89/400.75
  6. Step 6: Final answer
    x = 1,013.72

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.