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Finding the Fourth Proportional to 238.01, 355.21 and 231.86

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Solution

The fourth proportional to 238.01, 355.21 and 231.86 is: 346.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.01 : 355.21 = 231.86 : x
  2. Step 2: Convert to fraction form
    238.01/355.21 = 231.86/x
  3. Step 3: Cross multiply
    238.01x = 355.21 × 231.86
  4. Step 4: Simplify right side
    238.01x = 82,359.30
  5. Step 5: Solve for x
    x = 82,359.30/238.01
  6. Step 6: Final answer
    x = 346.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.