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Finding the Fourth Proportional to 3,951.90, 5,929.90 and 2,865.24

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Solution

The fourth proportional to 3,951.90, 5,929.90 and 2,865.24 is: 4,299.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.90 : 5,929.90 = 2,865.24 : x
  2. Step 2: Convert to fraction form
    3,951.90/5,929.90 = 2,865.24/x
  3. Step 3: Cross multiply
    3,951.90x = 5,929.90 × 2,865.24
  4. Step 4: Simplify right side
    3,951.90x = 16,990,568.60
  5. Step 5: Solve for x
    x = 16,990,568.60/3,951.90
  6. Step 6: Final answer
    x = 4,299.34

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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.