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Finding the Fourth Proportional to 414.42, 620.96 and 251.78

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Solution

The fourth proportional to 414.42, 620.96 and 251.78 is: 377.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.42 : 620.96 = 251.78 : x
  2. Step 2: Convert to fraction form
    414.42/620.96 = 251.78/x
  3. Step 3: Cross multiply
    414.42x = 620.96 × 251.78
  4. Step 4: Simplify right side
    414.42x = 156,345.31
  5. Step 5: Solve for x
    x = 156,345.31/414.42
  6. Step 6: Final answer
    x = 377.26

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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.