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Finding the Fourth Proportional to 5,859.90, 8,791.32 and 4,131.90

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Solution

The fourth proportional to 5,859.90, 8,791.32 and 4,131.90 is: 6,198.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,859.90 : 8,791.32 = 4,131.90 : x
  2. Step 2: Convert to fraction form
    5,859.90/8,791.32 = 4,131.90/x
  3. Step 3: Cross multiply
    5,859.90x = 8,791.32 × 4,131.90
  4. Step 4: Simplify right side
    5,859.90x = 36,324,855.11
  5. Step 5: Solve for x
    x = 36,324,855.11/5,859.90
  6. Step 6: Final answer
    x = 6,198.89

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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.