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Finding the Fourth Proportional to 232.97, 321.50 and 128.06

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Solution

The fourth proportional to 232.97, 321.50 and 128.06 is: 176.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.97 : 321.50 = 128.06 : x
  2. Step 2: Convert to fraction form
    232.97/321.50 = 128.06/x
  3. Step 3: Cross multiply
    232.97x = 321.50 × 128.06
  4. Step 4: Simplify right side
    232.97x = 41,171.29
  5. Step 5: Solve for x
    x = 41,171.29/232.97
  6. Step 6: Final answer
    x = 176.72

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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.