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Finding the Third Proportional to 3,905 and 5,126

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Solution

The third proportional to 3,905 and 5,126 is: 6,728.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905 : 5,126 = 5,126 : x
  2. Step 2: Convert to fraction form
    3,905/5,126 = 5,126/x
  3. Step 3: Cross multiply
    3,905x = 5,126 × 5,126
  4. Step 4: Simplify right side
    3,905x = 26,275,876
  5. Step 5: Solve for x
    x = 26,275,876/3,905
  6. Step 6: Final answer
    x = 6,728.78

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.