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Finding the Fourth Proportional to 238.28, 357.48 and 140.86

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Solution

The fourth proportional to 238.28, 357.48 and 140.86 is: 211.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.28 : 357.48 = 140.86 : x
  2. Step 2: Convert to fraction form
    238.28/357.48 = 140.86/x
  3. Step 3: Cross multiply
    238.28x = 357.48 × 140.86
  4. Step 4: Simplify right side
    238.28x = 50,355.08
  5. Step 5: Solve for x
    x = 50,355.08/238.28
  6. Step 6: Final answer
    x = 211.33

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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.