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Finding the Fourth Proportional to 206.46, 308.19 and 191.43

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Solution

The fourth proportional to 206.46, 308.19 and 191.43 is: 285.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.46 : 308.19 = 191.43 : x
  2. Step 2: Convert to fraction form
    206.46/308.19 = 191.43/x
  3. Step 3: Cross multiply
    206.46x = 308.19 × 191.43
  4. Step 4: Simplify right side
    206.46x = 58,996.81
  5. Step 5: Solve for x
    x = 58,996.81/206.46
  6. Step 6: Final answer
    x = 285.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.