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Finding the Fourth Proportional to 392,029.20, 587,352.60 and 321,526.80

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Solution

The fourth proportional to 392,029.20, 587,352.60 and 321,526.80 is: 481,723.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,029.20 : 587,352.60 = 321,526.80 : x
  2. Step 2: Convert to fraction form
    392,029.20/587,352.60 = 321,526.80/x
  3. Step 3: Cross multiply
    392,029.20x = 587,352.60 × 321,526.80
  4. Step 4: Simplify right side
    392,029.20x = 188,849,601,949.68
  5. Step 5: Solve for x
    x = 188,849,601,949.68/392,029.20
  6. Step 6: Final answer
    x = 481,723.31

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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.