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Finding the Fourth Proportional to 539,774.20, 809,142.90 and 419,764.60

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Solution

The fourth proportional to 539,774.20, 809,142.90 and 419,764.60 is: 629,243.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,774.20 : 809,142.90 = 419,764.60 : x
  2. Step 2: Convert to fraction form
    539,774.20/809,142.90 = 419,764.60/x
  3. Step 3: Cross multiply
    539,774.20x = 809,142.90 × 419,764.60
  4. Step 4: Simplify right side
    539,774.20x = 339,649,545,761.34
  5. Step 5: Solve for x
    x = 339,649,545,761.34/539,774.20
  6. Step 6: Final answer
    x = 629,243.76

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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.