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Finding the Fourth Proportional to 381,662.20, 572,493.30 and 221,573.80

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Solution

The fourth proportional to 381,662.20, 572,493.30 and 221,573.80 is: 332,360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,662.20 : 572,493.30 = 221,573.80 : x
  2. Step 2: Convert to fraction form
    381,662.20/572,493.30 = 221,573.80/x
  3. Step 3: Cross multiply
    381,662.20x = 572,493.30 × 221,573.80
  4. Step 4: Simplify right side
    381,662.20x = 126,849,515,955.54
  5. Step 5: Solve for x
    x = 126,849,515,955.54/381,662.20
  6. Step 6: Final answer
    x = 332,360.70

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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.