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Finding the Fourth Proportional to 234.72, 323.91 and 147.42

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Solution

The fourth proportional to 234.72, 323.91 and 147.42 is: 203.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.72 : 323.91 = 147.42 : x
  2. Step 2: Convert to fraction form
    234.72/323.91 = 147.42/x
  3. Step 3: Cross multiply
    234.72x = 323.91 × 147.42
  4. Step 4: Simplify right side
    234.72x = 47,750.81
  5. Step 5: Solve for x
    x = 47,750.81/234.72
  6. Step 6: Final answer
    x = 203.44

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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.