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Finding the Third Proportional to 129,600 and 279,432

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Solution

The third proportional to 129,600 and 279,432 is: 602,486.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,600 : 279,432 = 279,432 : x
  2. Step 2: Convert to fraction form
    129,600/279,432 = 279,432/x
  3. Step 3: Cross multiply
    129,600x = 279,432 × 279,432
  4. Step 4: Simplify right side
    129,600x = 78,082,242,624
  5. Step 5: Solve for x
    x = 78,082,242,624/129,600
  6. Step 6: Final answer
    x = 602,486.44

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Why These Related Problems?

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