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Finding the Fourth Proportional to 238.41, 329.33 and 228.42

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Solution

The fourth proportional to 238.41, 329.33 and 228.42 is: 315.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.41 : 329.33 = 228.42 : x
  2. Step 2: Convert to fraction form
    238.41/329.33 = 228.42/x
  3. Step 3: Cross multiply
    238.41x = 329.33 × 228.42
  4. Step 4: Simplify right side
    238.41x = 75,226.13
  5. Step 5: Solve for x
    x = 75,226.13/238.41
  6. Step 6: Final answer
    x = 315.53

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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.