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Finding the Third Proportional to 129,978 and 280,692

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Solution

The third proportional to 129,978 and 280,692 is: 606,164.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,978 : 280,692 = 280,692 : x
  2. Step 2: Convert to fraction form
    129,978/280,692 = 280,692/x
  3. Step 3: Cross multiply
    129,978x = 280,692 × 280,692
  4. Step 4: Simplify right side
    129,978x = 78,787,998,864
  5. Step 5: Solve for x
    x = 78,787,998,864/129,978
  6. Step 6: Final answer
    x = 606,164.11

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These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.