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Finding the Fourth Proportional to 447.94, 671.39 and 396.69

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Solution

The fourth proportional to 447.94, 671.39 and 396.69 is: 594.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.94 : 671.39 = 396.69 : x
  2. Step 2: Convert to fraction form
    447.94/671.39 = 396.69/x
  3. Step 3: Cross multiply
    447.94x = 671.39 × 396.69
  4. Step 4: Simplify right side
    447.94x = 266,333.70
  5. Step 5: Solve for x
    x = 266,333.70/447.94
  6. Step 6: Final answer
    x = 594.57

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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.