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Finding the Fourth Proportional to 394,469.20, 591,703.80 and 331,483.60

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Solution

The fourth proportional to 394,469.20, 591,703.80 and 331,483.60 is: 497,225.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,469.20 : 591,703.80 = 331,483.60 : x
  2. Step 2: Convert to fraction form
    394,469.20/591,703.80 = 331,483.60/x
  3. Step 3: Cross multiply
    394,469.20x = 591,703.80 × 331,483.60
  4. Step 4: Simplify right side
    394,469.20x = 196,140,105,757.68
  5. Step 5: Solve for x
    x = 196,140,105,757.68/394,469.20
  6. Step 6: Final answer
    x = 497,225.40

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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.