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Finding the Fourth Proportional to 203.39, 280.58 and 124.65

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Solution

The fourth proportional to 203.39, 280.58 and 124.65 is: 171.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.39 : 280.58 = 124.65 : x
  2. Step 2: Convert to fraction form
    203.39/280.58 = 124.65/x
  3. Step 3: Cross multiply
    203.39x = 280.58 × 124.65
  4. Step 4: Simplify right side
    203.39x = 34,974.30
  5. Step 5: Solve for x
    x = 34,974.30/203.39
  6. Step 6: Final answer
    x = 171.96

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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.