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Finding the Fourth Proportional to 414.98, 622.31 and 140.99

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Solution

The fourth proportional to 414.98, 622.31 and 140.99 is: 211.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.98 : 622.31 = 140.99 : x
  2. Step 2: Convert to fraction form
    414.98/622.31 = 140.99/x
  3. Step 3: Cross multiply
    414.98x = 622.31 × 140.99
  4. Step 4: Simplify right side
    414.98x = 87,735.67
  5. Step 5: Solve for x
    x = 87,735.67/414.98
  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.