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Finding the Fourth Proportional to 414.42, 620.20 and 397.41

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Solution

The fourth proportional to 414.42, 620.20 and 397.41 is: 594.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.42 : 620.20 = 397.41 : x
  2. Step 2: Convert to fraction form
    414.42/620.20 = 397.41/x
  3. Step 3: Cross multiply
    414.42x = 620.20 × 397.41
  4. Step 4: Simplify right side
    414.42x = 246,473.68
  5. Step 5: Solve for x
    x = 246,473.68/414.42
  6. Step 6: Final answer
    x = 594.74

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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.