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Finding the Fourth Proportional to 3,979.71, 5,972.82 and 1,672.83

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Solution

The fourth proportional to 3,979.71, 5,972.82 and 1,672.83 is: 2,510.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.71 : 5,972.82 = 1,672.83 : x
  2. Step 2: Convert to fraction form
    3,979.71/5,972.82 = 1,672.83/x
  3. Step 3: Cross multiply
    3,979.71x = 5,972.82 × 1,672.83
  4. Step 4: Simplify right side
    3,979.71x = 9,991,512.48
  5. Step 5: Solve for x
    x = 9,991,512.48/3,979.71
  6. Step 6: Final answer
    x = 2,510.61

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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.