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Finding the Fourth Proportional to 659,234.20, 987,539.10 and 343,868.80

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Solution

The fourth proportional to 659,234.20, 987,539.10 and 343,868.80 is: 515,118.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,234.20 : 987,539.10 = 343,868.80 : x
  2. Step 2: Convert to fraction form
    659,234.20/987,539.10 = 343,868.80/x
  3. Step 3: Cross multiply
    659,234.20x = 987,539.10 × 343,868.80
  4. Step 4: Simplify right side
    659,234.20x = 339,583,885,270.08
  5. Step 5: Solve for x
    x = 339,583,885,270.08/659,234.20
  6. Step 6: Final answer
    x = 515,118.73

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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.