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Finding the Fourth Proportional to 203.98, 281.47 and 115.47

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Solution

The fourth proportional to 203.98, 281.47 and 115.47 is: 159.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.98 : 281.47 = 115.47 : x
  2. Step 2: Convert to fraction form
    203.98/281.47 = 115.47/x
  3. Step 3: Cross multiply
    203.98x = 281.47 × 115.47
  4. Step 4: Simplify right side
    203.98x = 32,502.54
  5. Step 5: Solve for x
    x = 32,502.54/203.98
  6. Step 6: Final answer
    x = 159.34

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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.