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Finding the Fourth Proportional to 279.20, 396.08 and 279.20

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Solution

The fourth proportional to 279.20, 396.08 and 279.20 is: 396.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.20 : 396.08 = 279.20 : x
  2. Step 2: Convert to fraction form
    279.20/396.08 = 279.20/x
  3. Step 3: Cross multiply
    279.20x = 396.08 × 279.20
  4. Step 4: Simplify right side
    279.20x = 110,585.54
  5. Step 5: Solve for x
    x = 110,585.54/279.20
  6. Step 6: Final answer
    x = 396.08

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.