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Finding the Fourth Proportional to 234.80, 323.40 and 203.60

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Solution

The fourth proportional to 234.80, 323.40 and 203.60 is: 280.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.80 : 323.40 = 203.60 : x
  2. Step 2: Convert to fraction form
    234.80/323.40 = 203.60/x
  3. Step 3: Cross multiply
    234.80x = 323.40 × 203.60
  4. Step 4: Simplify right side
    234.80x = 65,844.24
  5. Step 5: Solve for x
    x = 65,844.24/234.80
  6. Step 6: Final answer
    x = 280.43

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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.