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Finding the Fourth Proportional to 3,469.78, 5,204.67 and 872.72

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Solution

The fourth proportional to 3,469.78, 5,204.67 and 872.72 is: 1,309.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,469.78 : 5,204.67 = 872.72 : x
  2. Step 2: Convert to fraction form
    3,469.78/5,204.67 = 872.72/x
  3. Step 3: Cross multiply
    3,469.78x = 5,204.67 × 872.72
  4. Step 4: Simplify right side
    3,469.78x = 4,542,193.58
  5. Step 5: Solve for x
    x = 4,542,193.58/3,469.78
  6. Step 6: Final answer
    x = 1,309.07

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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.