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Finding the Fourth Proportional to 206.64, 308.25 and 191.79

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Solution

The fourth proportional to 206.64, 308.25 and 191.79 is: 286.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.64 : 308.25 = 191.79 : x
  2. Step 2: Convert to fraction form
    206.64/308.25 = 191.79/x
  3. Step 3: Cross multiply
    206.64x = 308.25 × 191.79
  4. Step 4: Simplify right side
    206.64x = 59,119.27
  5. Step 5: Solve for x
    x = 59,119.27/206.64
  6. Step 6: Final answer
    x = 286.10

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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.