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Finding the Fourth Proportional to 379,654.74, 570,367.85 and 221,993.91

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Solution

The fourth proportional to 379,654.74, 570,367.85 and 221,993.91 is: 333,508.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,654.74 : 570,367.85 = 221,993.91 : x
  2. Step 2: Convert to fraction form
    379,654.74/570,367.85 = 221,993.91/x
  3. Step 3: Cross multiply
    379,654.74x = 570,367.85 × 221,993.91
  4. Step 4: Simplify right side
    379,654.74x = 126,618,188,049.82
  5. Step 5: Solve for x
    x = 126,618,188,049.82/379,654.74
  6. Step 6: Final answer
    x = 333,508.78

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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.