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Finding the Fourth Proportional to 398,432.20, 595,920.30 and 356,614.60

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Solution

The fourth proportional to 398,432.20, 595,920.30 and 356,614.60 is: 533,375.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,432.20 : 595,920.30 = 356,614.60 : x
  2. Step 2: Convert to fraction form
    398,432.20/595,920.30 = 356,614.60/x
  3. Step 3: Cross multiply
    398,432.20x = 595,920.30 × 356,614.60
  4. Step 4: Simplify right side
    398,432.20x = 212,513,879,416.38
  5. Step 5: Solve for x
    x = 212,513,879,416.38/398,432.20
  6. Step 6: Final answer
    x = 533,375.26

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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.