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Finding the Third Proportional to 276,918 and 414,917

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Solution

The third proportional to 276,918 and 414,917 is: 621,686.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,918 : 414,917 = 414,917 : x
  2. Step 2: Convert to fraction form
    276,918/414,917 = 414,917/x
  3. Step 3: Cross multiply
    276,918x = 414,917 × 414,917
  4. Step 4: Simplify right side
    276,918x = 172,156,116,889
  5. Step 5: Solve for x
    x = 172,156,116,889/276,918
  6. Step 6: Final answer
    x = 621,686.26

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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.