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Finding the Fourth Proportional to 395,625.60, 593,438.40 and 129,321.90

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Solution

The fourth proportional to 395,625.60, 593,438.40 and 129,321.90 is: 193,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,625.60 : 593,438.40 = 129,321.90 : x
  2. Step 2: Convert to fraction form
    395,625.60/593,438.40 = 129,321.90/x
  3. Step 3: Cross multiply
    395,625.60x = 593,438.40 × 129,321.90
  4. Step 4: Simplify right side
    395,625.60x = 76,744,581,420.96
  5. Step 5: Solve for x
    x = 76,744,581,420.96/395,625.60
  6. Step 6: Final answer
    x = 193,982.85

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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.