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Finding the Third Proportional to 277,979 and 415,723

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Solution

The third proportional to 277,979 and 415,723 is: 621,721.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    277,979 : 415,723 = 415,723 : x
  2. Step 2: Convert to fraction form
    277,979/415,723 = 415,723/x
  3. Step 3: Cross multiply
    277,979x = 415,723 × 415,723
  4. Step 4: Simplify right side
    277,979x = 172,825,612,729
  5. Step 5: Solve for x
    x = 172,825,612,729/277,979
  6. Step 6: Final answer
    x = 621,721.83

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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.