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Finding the Fourth Proportional to 5,324.12, 7,978.84 and 2,721.64

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Solution

The fourth proportional to 5,324.12, 7,978.84 and 2,721.64 is: 4,078.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,324.12 : 7,978.84 = 2,721.64 : x
  2. Step 2: Convert to fraction form
    5,324.12/7,978.84 = 2,721.64/x
  3. Step 3: Cross multiply
    5,324.12x = 7,978.84 × 2,721.64
  4. Step 4: Simplify right side
    5,324.12x = 21,715,530.10
  5. Step 5: Solve for x
    x = 21,715,530.10/5,324.12
  6. Step 6: Final answer
    x = 4,078.71

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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.