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Finding the Fourth Proportional to 234.81, 323.85 and 156.09

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Solution

The fourth proportional to 234.81, 323.85 and 156.09 is: 215.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.81 : 323.85 = 156.09 : x
  2. Step 2: Convert to fraction form
    234.81/323.85 = 156.09/x
  3. Step 3: Cross multiply
    234.81x = 323.85 × 156.09
  4. Step 4: Simplify right side
    234.81x = 50,549.75
  5. Step 5: Solve for x
    x = 50,549.75/234.81
  6. Step 6: Final answer
    x = 215.28

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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.