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Finding the Fourth Proportional to 206.17, 284.02 and 143.89

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Solution

The fourth proportional to 206.17, 284.02 and 143.89 is: 198.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.17 : 284.02 = 143.89 : x
  2. Step 2: Convert to fraction form
    206.17/284.02 = 143.89/x
  3. Step 3: Cross multiply
    206.17x = 284.02 × 143.89
  4. Step 4: Simplify right side
    206.17x = 40,867.38
  5. Step 5: Solve for x
    x = 40,867.38/206.17
  6. Step 6: Final answer
    x = 198.22

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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.