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Finding the Fourth Proportional to 238.85, 358.29 and 76.55

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Solution

The fourth proportional to 238.85, 358.29 and 76.55 is: 114.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.85 : 358.29 = 76.55 : x
  2. Step 2: Convert to fraction form
    238.85/358.29 = 76.55/x
  3. Step 3: Cross multiply
    238.85x = 358.29 × 76.55
  4. Step 4: Simplify right side
    238.85x = 27,425.31
  5. Step 5: Solve for x
    x = 27,425.31/238.85
  6. Step 6: Final answer
    x = 114.82

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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.