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Finding the Third Proportional to 276,874.50 and 415,311

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Solution

The third proportional to 276,874.50 and 415,311 is: 622,965.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,874.50 : 415,311 = 415,311 : x
  2. Step 2: Convert to fraction form
    276,874.50/415,311 = 415,311/x
  3. Step 3: Cross multiply
    276,874.50x = 415,311 × 415,311
  4. Step 4: Simplify right side
    276,874.50x = 172,483,226,721
  5. Step 5: Solve for x
    x = 172,483,226,721/276,874.50
  6. Step 6: Final answer
    x = 622,965.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.