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Finding the Fourth Proportional to 543,487.20, 815,425.20 and 228,040.80

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Solution

The fourth proportional to 543,487.20, 815,425.20 and 228,040.80 is: 342,142.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,487.20 : 815,425.20 = 228,040.80 : x
  2. Step 2: Convert to fraction form
    543,487.20/815,425.20 = 228,040.80/x
  3. Step 3: Cross multiply
    543,487.20x = 815,425.20 × 228,040.80
  4. Step 4: Simplify right side
    543,487.20x = 185,950,214,948.16
  5. Step 5: Solve for x
    x = 185,950,214,948.16/543,487.20
  6. Step 6: Final answer
    x = 342,142.77

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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.