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Finding the Fourth Proportional to 399,195.90, 598,793.85 and 391,322.70

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Solution

The fourth proportional to 399,195.90, 598,793.85 and 391,322.70 is: 586,984.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,195.90 : 598,793.85 = 391,322.70 : x
  2. Step 2: Convert to fraction form
    399,195.90/598,793.85 = 391,322.70/x
  3. Step 3: Cross multiply
    399,195.90x = 598,793.85 × 391,322.70
  4. Step 4: Simplify right side
    399,195.90x = 234,321,626,125.40
  5. Step 5: Solve for x
    x = 234,321,626,125.40/399,195.90
  6. Step 6: Final answer
    x = 586,984.05

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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.