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Finding the Fourth Proportional to 543,821.20, 815,731.80 and 539,884.60

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Solution

The fourth proportional to 543,821.20, 815,731.80 and 539,884.60 is: 809,826.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,821.20 : 815,731.80 = 539,884.60 : x
  2. Step 2: Convert to fraction form
    543,821.20/815,731.80 = 539,884.60/x
  3. Step 3: Cross multiply
    543,821.20x = 815,731.80 × 539,884.60
  4. Step 4: Simplify right side
    543,821.20x = 440,401,036,550.28
  5. Step 5: Solve for x
    x = 440,401,036,550.28/543,821.20
  6. Step 6: Final answer
    x = 809,826.90

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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.