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Finding the Fourth Proportional to 238.95, 331.97 and 236.70

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Solution

The fourth proportional to 238.95, 331.97 and 236.70 is: 328.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.95 : 331.97 = 236.70 : x
  2. Step 2: Convert to fraction form
    238.95/331.97 = 236.70/x
  3. Step 3: Cross multiply
    238.95x = 331.97 × 236.70
  4. Step 4: Simplify right side
    238.95x = 78,576.12
  5. Step 5: Solve for x
    x = 78,576.12/238.95
  6. Step 6: Final answer
    x = 328.84

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.