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Finding the Fourth Proportional to 235.52, 351.28 and 231.20

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Solution

The fourth proportional to 235.52, 351.28 and 231.20 is: 344.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.52 : 351.28 = 231.20 : x
  2. Step 2: Convert to fraction form
    235.52/351.28 = 231.20/x
  3. Step 3: Cross multiply
    235.52x = 351.28 × 231.20
  4. Step 4: Simplify right side
    235.52x = 81,215.94
  5. Step 5: Solve for x
    x = 81,215.94/235.52
  6. Step 6: Final answer
    x = 344.84

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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.