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Finding the Third Proportional to 100,917 and 221,514

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Solution

The third proportional to 100,917 and 221,514 is: 486,225.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,917 : 221,514 = 221,514 : x
  2. Step 2: Convert to fraction form
    100,917/221,514 = 221,514/x
  3. Step 3: Cross multiply
    100,917x = 221,514 × 221,514
  4. Step 4: Simplify right side
    100,917x = 49,068,452,196
  5. Step 5: Solve for x
    x = 49,068,452,196/100,917
  6. Step 6: Final answer
    x = 486,225.83

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.