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Finding the Fourth Proportional to 204.11, 306.44 and 126.81

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Solution

The fourth proportional to 204.11, 306.44 and 126.81 is: 190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.11 : 306.44 = 126.81 : x
  2. Step 2: Convert to fraction form
    204.11/306.44 = 126.81/x
  3. Step 3: Cross multiply
    204.11x = 306.44 × 126.81
  4. Step 4: Simplify right side
    204.11x = 38,859.02
  5. Step 5: Solve for x
    x = 38,859.02/204.11
  6. Step 6: Final answer
    x = 190.39

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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.