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Finding the Fourth Proportional to 206.28, 307.78 and 195.55

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Solution

The fourth proportional to 206.28, 307.78 and 195.55 is: 291.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.28 : 307.78 = 195.55 : x
  2. Step 2: Convert to fraction form
    206.28/307.78 = 195.55/x
  3. Step 3: Cross multiply
    206.28x = 307.78 × 195.55
  4. Step 4: Simplify right side
    206.28x = 60,185.12
  5. Step 5: Solve for x
    x = 60,185.12/206.28
  6. Step 6: Final answer
    x = 291.76

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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.