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Finding the Fourth Proportional to 206.01, 284.28 and 121.97

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Solution

The fourth proportional to 206.01, 284.28 and 121.97 is: 168.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.01 : 284.28 = 121.97 : x
  2. Step 2: Convert to fraction form
    206.01/284.28 = 121.97/x
  3. Step 3: Cross multiply
    206.01x = 284.28 × 121.97
  4. Step 4: Simplify right side
    206.01x = 34,673.88
  5. Step 5: Solve for x
    x = 34,673.88/206.01
  6. Step 6: Final answer
    x = 168.31

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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.