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Finding the Fourth Proportional to 3,408.69, 5,118.03 and 2,981.01

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Solution

The fourth proportional to 3,408.69, 5,118.03 and 2,981.01 is: 4,475.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.69 : 5,118.03 = 2,981.01 : x
  2. Step 2: Convert to fraction form
    3,408.69/5,118.03 = 2,981.01/x
  3. Step 3: Cross multiply
    3,408.69x = 5,118.03 × 2,981.01
  4. Step 4: Simplify right side
    3,408.69x = 15,256,898.61
  5. Step 5: Solve for x
    x = 15,256,898.61/3,408.69
  6. Step 6: Final answer
    x = 4,475.88

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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.