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Finding the Fourth Proportional to 539,991.70, 809,469.15 and 419,982.10

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Solution

The fourth proportional to 539,991.70, 809,469.15 and 419,982.10 is: 629,569.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,991.70 : 809,469.15 = 419,982.10 : x
  2. Step 2: Convert to fraction form
    539,991.70/809,469.15 = 419,982.10/x
  3. Step 3: Cross multiply
    539,991.70x = 809,469.15 × 419,982.10
  4. Step 4: Simplify right side
    539,991.70x = 339,962,553,502.22
  5. Step 5: Solve for x
    x = 339,962,553,502.22/539,991.70
  6. Step 6: Final answer
    x = 629,569.96

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1.5x scale

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.