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Finding the Fourth Proportional to 234.45, 323.31 and 155.73

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Solution

The fourth proportional to 234.45, 323.31 and 155.73 is: 214.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.45 : 323.31 = 155.73 : x
  2. Step 2: Convert to fraction form
    234.45/323.31 = 155.73/x
  3. Step 3: Cross multiply
    234.45x = 323.31 × 155.73
  4. Step 4: Simplify right side
    234.45x = 50,349.07
  5. Step 5: Solve for x
    x = 50,349.07/234.45
  6. Step 6: Final answer
    x = 214.75

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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.