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Finding the Fourth Proportional to 279.10, 418.48 and 130.69

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Solution

The fourth proportional to 279.10, 418.48 and 130.69 is: 195.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.10 : 418.48 = 130.69 : x
  2. Step 2: Convert to fraction form
    279.10/418.48 = 130.69/x
  3. Step 3: Cross multiply
    279.10x = 418.48 × 130.69
  4. Step 4: Simplify right side
    279.10x = 54,691.15
  5. Step 5: Solve for x
    x = 54,691.15/279.10
  6. Step 6: Final answer
    x = 195.96

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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.