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Finding the Fourth Proportional to 5,324.16, 7,978.84 and 2,721.60

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Solution

The fourth proportional to 5,324.16, 7,978.84 and 2,721.60 is: 4,078.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,324.16 : 7,978.84 = 2,721.60 : x
  2. Step 2: Convert to fraction form
    5,324.16/7,978.84 = 2,721.60/x
  3. Step 3: Cross multiply
    5,324.16x = 7,978.84 × 2,721.60
  4. Step 4: Simplify right side
    5,324.16x = 21,715,210.94
  5. Step 5: Solve for x
    x = 21,715,210.94/5,324.16
  6. Step 6: Final answer
    x = 4,078.62

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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.