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Finding the Fourth Proportional to 414.87, 622.30 and 140.95

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Solution

The fourth proportional to 414.87, 622.30 and 140.95 is: 211.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.87 : 622.30 = 140.95 : x
  2. Step 2: Convert to fraction form
    414.87/622.30 = 140.95/x
  3. Step 3: Cross multiply
    414.87x = 622.30 × 140.95
  4. Step 4: Simplify right side
    414.87x = 87,713.19
  5. Step 5: Solve for x
    x = 87,713.19/414.87
  6. Step 6: Final answer
    x = 211.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.