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Finding the Fourth Proportional to 447.32, 617.42 and 330.68

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Solution

The fourth proportional to 447.32, 617.42 and 330.68 is: 456.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.32 : 617.42 = 330.68 : x
  2. Step 2: Convert to fraction form
    447.32/617.42 = 330.68/x
  3. Step 3: Cross multiply
    447.32x = 617.42 × 330.68
  4. Step 4: Simplify right side
    447.32x = 204,168.45
  5. Step 5: Solve for x
    x = 204,168.45/447.32
  6. Step 6: Final answer
    x = 456.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.