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Finding the Fourth Proportional to 3,979.16, 5,965.20 and 1,512.31

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Solution

The fourth proportional to 3,979.16, 5,965.20 and 1,512.31 is: 2,267.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.16 : 5,965.20 = 1,512.31 : x
  2. Step 2: Convert to fraction form
    3,979.16/5,965.20 = 1,512.31/x
  3. Step 3: Cross multiply
    3,979.16x = 5,965.20 × 1,512.31
  4. Step 4: Simplify right side
    3,979.16x = 9,021,231.61
  5. Step 5: Solve for x
    x = 9,021,231.61/3,979.16
  6. Step 6: Final answer
    x = 2,267.12

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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.