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Finding the Fourth Proportional to 543,620.20, 815,430.30 and 331,043.80

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Solution

The fourth proportional to 543,620.20, 815,430.30 and 331,043.80 is: 496,565.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,620.20 : 815,430.30 = 331,043.80 : x
  2. Step 2: Convert to fraction form
    543,620.20/815,430.30 = 331,043.80/x
  3. Step 3: Cross multiply
    543,620.20x = 815,430.30 × 331,043.80
  4. Step 4: Simplify right side
    543,620.20x = 269,943,145,147.14
  5. Step 5: Solve for x
    x = 269,943,145,147.14/543,620.20
  6. Step 6: Final answer
    x = 496,565.70

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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.