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Finding the Fourth Proportional to 3,951.05, 5,909.13 and 3,515.38

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Solution

The fourth proportional to 3,951.05, 5,909.13 and 3,515.38 is: 5,257.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.05 : 5,909.13 = 3,515.38 : x
  2. Step 2: Convert to fraction form
    3,951.05/5,909.13 = 3,515.38/x
  3. Step 3: Cross multiply
    3,951.05x = 5,909.13 × 3,515.38
  4. Step 4: Simplify right side
    3,951.05x = 20,772,822.65
  5. Step 5: Solve for x
    x = 20,772,822.65/3,951.05
  6. Step 6: Final answer
    x = 5,257.55

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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.