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Finding the Fourth Proportional to 234.72, 323.90 and 135.13

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Solution

The fourth proportional to 234.72, 323.90 and 135.13 is: 186.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.72 : 323.90 = 135.13 : x
  2. Step 2: Convert to fraction form
    234.72/323.90 = 135.13/x
  3. Step 3: Cross multiply
    234.72x = 323.90 × 135.13
  4. Step 4: Simplify right side
    234.72x = 43,767.63
  5. Step 5: Solve for x
    x = 43,767.63/234.72
  6. Step 6: Final answer
    x = 186.47

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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.