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Finding the Fourth Proportional to 399,205.20, 598,807.80 and 372,766.80

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Solution

The fourth proportional to 399,205.20, 598,807.80 and 372,766.80 is: 559,150.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,205.20 : 598,807.80 = 372,766.80 : x
  2. Step 2: Convert to fraction form
    399,205.20/598,807.80 = 372,766.80/x
  3. Step 3: Cross multiply
    399,205.20x = 598,807.80 × 372,766.80
  4. Step 4: Simplify right side
    399,205.20x = 223,215,667,421.04
  5. Step 5: Solve for x
    x = 223,215,667,421.04/399,205.20
  6. Step 6: Final answer
    x = 559,150.20

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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.