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Finding the Third Proportional to 3,982 and 5,151

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Solution

The third proportional to 3,982 and 5,151 is: 6,663.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982 : 5,151 = 5,151 : x
  2. Step 2: Convert to fraction form
    3,982/5,151 = 5,151/x
  3. Step 3: Cross multiply
    3,982x = 5,151 × 5,151
  4. Step 4: Simplify right side
    3,982x = 26,532,801
  5. Step 5: Solve for x
    x = 26,532,801/3,982
  6. Step 6: Final answer
    x = 6,663.18

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.