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Finding the Fourth Proportional to 238.08, 327.60 and 231.60

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Solution

The fourth proportional to 238.08, 327.60 and 231.60 is: 318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.08 : 327.60 = 231.60 : x
  2. Step 2: Convert to fraction form
    238.08/327.60 = 231.60/x
  3. Step 3: Cross multiply
    238.08x = 327.60 × 231.60
  4. Step 4: Simplify right side
    238.08x = 75,872.16
  5. Step 5: Solve for x
    x = 75,872.16/238.08
  6. Step 6: Final answer
    x = 318.68

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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.