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Finding the Fourth Proportional to 204.21, 306.35 and 112.88

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Solution

The fourth proportional to 204.21, 306.35 and 112.88 is: 169.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.21 : 306.35 = 112.88 : x
  2. Step 2: Convert to fraction form
    204.21/306.35 = 112.88/x
  3. Step 3: Cross multiply
    204.21x = 306.35 × 112.88
  4. Step 4: Simplify right side
    204.21x = 34,578.69
  5. Step 5: Solve for x
    x = 34,578.69/204.21
  6. Step 6: Final answer
    x = 169.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.