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Finding the Fourth Proportional to 392,078.17, 587,329.75 and 331,848.37

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Solution

The fourth proportional to 392,078.17, 587,329.75 and 331,848.37 is: 497,106.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,078.17 : 587,329.75 = 331,848.37 : x
  2. Step 2: Convert to fraction form
    392,078.17/587,329.75 = 331,848.37/x
  3. Step 3: Cross multiply
    392,078.17x = 587,329.75 × 331,848.37
  4. Step 4: Simplify right side
    392,078.17x = 194,904,420,190.01
  5. Step 5: Solve for x
    x = 194,904,420,190.01/392,078.17
  6. Step 6: Final answer
    x = 497,106.02

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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.