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Finding the Fourth Proportional to 3,981.90, 5,972.13 and 1,349.13

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Solution

The fourth proportional to 3,981.90, 5,972.13 and 1,349.13 is: 2,023.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.90 : 5,972.13 = 1,349.13 : x
  2. Step 2: Convert to fraction form
    3,981.90/5,972.13 = 1,349.13/x
  3. Step 3: Cross multiply
    3,981.90x = 5,972.13 × 1,349.13
  4. Step 4: Simplify right side
    3,981.90x = 8,057,179.75
  5. Step 5: Solve for x
    x = 8,057,179.75/3,981.90
  6. Step 6: Final answer
    x = 2,023.45

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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.