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Finding the Fourth Proportional to 3,954.99, 5,920.17 and 2,491.07

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Solution

The fourth proportional to 3,954.99, 5,920.17 and 2,491.07 is: 3,728.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,954.99 : 5,920.17 = 2,491.07 : x
  2. Step 2: Convert to fraction form
    3,954.99/5,920.17 = 2,491.07/x
  3. Step 3: Cross multiply
    3,954.99x = 5,920.17 × 2,491.07
  4. Step 4: Simplify right side
    3,954.99x = 14,747,557.88
  5. Step 5: Solve for x
    x = 14,747,557.88/3,954.99
  6. Step 6: Final answer
    x = 3,728.85

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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.