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Finding the Fourth Proportional to 3,979.76, 5,957.30 and 3,389.27

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Solution

The fourth proportional to 3,979.76, 5,957.30 and 3,389.27 is: 5,073.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.76 : 5,957.30 = 3,389.27 : x
  2. Step 2: Convert to fraction form
    3,979.76/5,957.30 = 3,389.27/x
  3. Step 3: Cross multiply
    3,979.76x = 5,957.30 × 3,389.27
  4. Step 4: Simplify right side
    3,979.76x = 20,190,851.44
  5. Step 5: Solve for x
    x = 20,190,851.44/3,979.76
  6. Step 6: Final answer
    x = 5,073.39

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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.