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Finding the Third Proportional to 3,391.56 and 5,108.70

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Solution

The third proportional to 3,391.56 and 5,108.70 is: 7,695.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.56 : 5,108.70 = 5,108.70 : x
  2. Step 2: Convert to fraction form
    3,391.56/5,108.70 = 5,108.70/x
  3. Step 3: Cross multiply
    3,391.56x = 5,108.70 × 5,108.70
  4. Step 4: Simplify right side
    3,391.56x = 26,098,767.80
  5. Step 5: Solve for x
    x = 26,098,767.80/3,391.56
  6. Step 6: Final answer
    x = 7,695.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.