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Finding the Fourth Proportional to 238.98, 358.29 and 92.61

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Solution

The fourth proportional to 238.98, 358.29 and 92.61 is: 138.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.98 : 358.29 = 92.61 : x
  2. Step 2: Convert to fraction form
    238.98/358.29 = 92.61/x
  3. Step 3: Cross multiply
    238.98x = 358.29 × 92.61
  4. Step 4: Simplify right side
    238.98x = 33,181.24
  5. Step 5: Solve for x
    x = 33,181.24/238.98
  6. Step 6: Final answer
    x = 138.85

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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.