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Finding the Fourth Proportional to 391,510.80, 587,266.20 and 381,669.30

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Solution

The fourth proportional to 391,510.80, 587,266.20 and 381,669.30 is: 572,503.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,510.80 : 587,266.20 = 381,669.30 : x
  2. Step 2: Convert to fraction form
    391,510.80/587,266.20 = 381,669.30/x
  3. Step 3: Cross multiply
    391,510.80x = 587,266.20 × 381,669.30
  4. Step 4: Simplify right side
    391,510.80x = 224,141,479,467.66
  5. Step 5: Solve for x
    x = 224,141,479,467.66/391,510.80
  6. Step 6: Final answer
    x = 572,503.95

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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.