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Finding the Fourth Proportional to 206.11, 283.94 and 143.82

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Solution

The fourth proportional to 206.11, 283.94 and 143.82 is: 198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.11 : 283.94 = 143.82 : x
  2. Step 2: Convert to fraction form
    206.11/283.94 = 143.82/x
  3. Step 3: Cross multiply
    206.11x = 283.94 × 143.82
  4. Step 4: Simplify right side
    206.11x = 40,836.60
  5. Step 5: Solve for x
    x = 40,836.60/206.11
  6. Step 6: Final answer
    x = 198.13

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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.