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Finding the Fourth Proportional to 239.92, 331.08 and 152.72

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Solution

The fourth proportional to 239.92, 331.08 and 152.72 is: 210.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.92 : 331.08 = 152.72 : x
  2. Step 2: Convert to fraction form
    239.92/331.08 = 152.72/x
  3. Step 3: Cross multiply
    239.92x = 331.08 × 152.72
  4. Step 4: Simplify right side
    239.92x = 50,562.54
  5. Step 5: Solve for x
    x = 50,562.54/239.92
  6. Step 6: Final answer
    x = 210.75

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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.