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Finding the Fourth Proportional to 414.79, 620.84 and 251.71

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Solution

The fourth proportional to 414.79, 620.84 and 251.71 is: 376.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.79 : 620.84 = 251.71 : x
  2. Step 2: Convert to fraction form
    414.79/620.84 = 251.71/x
  3. Step 3: Cross multiply
    414.79x = 620.84 × 251.71
  4. Step 4: Simplify right side
    414.79x = 156,270.38
  5. Step 5: Solve for x
    x = 156,270.38/414.79
  6. Step 6: Final answer
    x = 376.75

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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.