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Finding the Fourth Proportional to 203.97, 281.21 and 151.55

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Solution

The fourth proportional to 203.97, 281.21 and 151.55 is: 208.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.97 : 281.21 = 151.55 : x
  2. Step 2: Convert to fraction form
    203.97/281.21 = 151.55/x
  3. Step 3: Cross multiply
    203.97x = 281.21 × 151.55
  4. Step 4: Simplify right side
    203.97x = 42,615.21
  5. Step 5: Solve for x
    x = 42,615.21/203.97
  6. Step 6: Final answer
    x = 208.93

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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.