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Finding the Third Proportional to 129,215 and 274,086

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Solution

The third proportional to 129,215 and 274,086 is: 581,380.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,215 : 274,086 = 274,086 : x
  2. Step 2: Convert to fraction form
    129,215/274,086 = 274,086/x
  3. Step 3: Cross multiply
    129,215x = 274,086 × 274,086
  4. Step 4: Simplify right side
    129,215x = 75,123,135,396
  5. Step 5: Solve for x
    x = 75,123,135,396/129,215
  6. Step 6: Final answer
    x = 581,380.92

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.