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Finding the Fourth Proportional to 234.68, 323.80 and 135.09

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Solution

The fourth proportional to 234.68, 323.80 and 135.09 is: 186.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.68 : 323.80 = 135.09 : x
  2. Step 2: Convert to fraction form
    234.68/323.80 = 135.09/x
  3. Step 3: Cross multiply
    234.68x = 323.80 × 135.09
  4. Step 4: Simplify right side
    234.68x = 43,741.80
  5. Step 5: Solve for x
    x = 43,741.80/234.68
  6. Step 6: Final answer
    x = 186.39

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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.