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Finding the Third Proportional to 4,987 and 5,551

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Solution

The third proportional to 4,987 and 5,551 is: 6,178.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987 : 5,551 = 5,551 : x
  2. Step 2: Convert to fraction form
    4,987/5,551 = 5,551/x
  3. Step 3: Cross multiply
    4,987x = 5,551 × 5,551
  4. Step 4: Simplify right side
    4,987x = 30,813,601
  5. Step 5: Solve for x
    x = 30,813,601/4,987
  6. Step 6: Final answer
    x = 6,178.79

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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.