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Finding the Fourth Proportional to 414.90, 622.38 and 126.34

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Solution

The fourth proportional to 414.90, 622.38 and 126.34 is: 189.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.90 : 622.38 = 126.34 : x
  2. Step 2: Convert to fraction form
    414.90/622.38 = 126.34/x
  3. Step 3: Cross multiply
    414.90x = 622.38 × 126.34
  4. Step 4: Simplify right side
    414.90x = 78,631.49
  5. Step 5: Solve for x
    x = 78,631.49/414.90
  6. Step 6: Final answer
    x = 189.52

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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.