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Finding the Fourth Proportional to 206.35, 284.78 and 140.95

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Solution

The fourth proportional to 206.35, 284.78 and 140.95 is: 194.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.35 : 284.78 = 140.95 : x
  2. Step 2: Convert to fraction form
    206.35/284.78 = 140.95/x
  3. Step 3: Cross multiply
    206.35x = 284.78 × 140.95
  4. Step 4: Simplify right side
    206.35x = 40,138.85
  5. Step 5: Solve for x
    x = 40,138.85/206.35
  6. Step 6: Final answer
    x = 194.52

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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.