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Finding the Fourth Proportional to 286.38, 395.15 and 169.88

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Solution

The fourth proportional to 286.38, 395.15 and 169.88 is: 234.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.38 : 395.15 = 169.88 : x
  2. Step 2: Convert to fraction form
    286.38/395.15 = 169.88/x
  3. Step 3: Cross multiply
    286.38x = 395.15 × 169.88
  4. Step 4: Simplify right side
    286.38x = 67,125.26
  5. Step 5: Solve for x
    x = 67,125.26/286.38
  6. Step 6: Final answer
    x = 234.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.