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Finding the Fourth Proportional to 7,408.50, 11,115.33 and 3,709.90

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Solution

The fourth proportional to 7,408.50, 11,115.33 and 3,709.90 is: 5,566.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,408.50 : 11,115.33 = 3,709.90 : x
  2. Step 2: Convert to fraction form
    7,408.50/11,115.33 = 3,709.90/x
  3. Step 3: Cross multiply
    7,408.50x = 11,115.33 × 3,709.90
  4. Step 4: Simplify right side
    7,408.50x = 41,236,762.75
  5. Step 5: Solve for x
    x = 41,236,762.75/7,408.50
  6. Step 6: Final answer
    x = 5,566.14

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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.