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Finding the Fourth Proportional to 3,721.88, 5,136.20 and 2,065.88

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Solution

The fourth proportional to 3,721.88, 5,136.20 and 2,065.88 is: 2,850.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.88 : 5,136.20 = 2,065.88 : x
  2. Step 2: Convert to fraction form
    3,721.88/5,136.20 = 2,065.88/x
  3. Step 3: Cross multiply
    3,721.88x = 5,136.20 × 2,065.88
  4. Step 4: Simplify right side
    3,721.88x = 10,610,736.85
  5. Step 5: Solve for x
    x = 10,610,736.85/3,721.88
  6. Step 6: Final answer
    x = 2,850.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.