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Finding the Fourth Proportional to 279,940,441.90, 419,910,662.85 and 221,489,805.10

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Solution

The fourth proportional to 279,940,441.90, 419,910,662.85 and 221,489,805.10 is: 332,234,707.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,940,441.90 : 419,910,662.85 = 221,489,805.10 : x
  2. Step 2: Convert to fraction form
    279,940,441.90/419,910,662.85 = 221,489,805.10/x
  3. Step 3: Cross multiply
    279,940,441.90x = 419,910,662.85 × 221,489,805.10
  4. Step 4: Simplify right side
    279,940,441.90x = 93,005,930,874,058,320
  5. Step 5: Solve for x
    x = 93,005,930,874,058,320/279,940,441.90
  6. Step 6: Final answer
    x = 332,234,707.65

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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.