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Finding the Fourth Proportional to 552.80, 829.84 and 279.20

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Solution

The fourth proportional to 552.80, 829.84 and 279.20 is: 419.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.80 : 829.84 = 279.20 : x
  2. Step 2: Convert to fraction form
    552.80/829.84 = 279.20/x
  3. Step 3: Cross multiply
    552.80x = 829.84 × 279.20
  4. Step 4: Simplify right side
    552.80x = 231,691.33
  5. Step 5: Solve for x
    x = 231,691.33/552.80
  6. Step 6: Final answer
    x = 419.12

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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.