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Finding the Third Proportional to 3,742 and 4,138

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Solution

The third proportional to 3,742 and 4,138 is: 4,575.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,742 : 4,138 = 4,138 : x
  2. Step 2: Convert to fraction form
    3,742/4,138 = 4,138/x
  3. Step 3: Cross multiply
    3,742x = 4,138 × 4,138
  4. Step 4: Simplify right side
    3,742x = 17,123,044
  5. Step 5: Solve for x
    x = 17,123,044/3,742
  6. Step 6: Final answer
    x = 4,575.91

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.