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Finding the Fourth Proportional to 447.44, 667.02 and 440.42

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Solution

The fourth proportional to 447.44, 667.02 and 440.42 is: 656.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.44 : 667.02 = 440.42 : x
  2. Step 2: Convert to fraction form
    447.44/667.02 = 440.42/x
  3. Step 3: Cross multiply
    447.44x = 667.02 × 440.42
  4. Step 4: Simplify right side
    447.44x = 293,768.95
  5. Step 5: Solve for x
    x = 293,768.95/447.44
  6. Step 6: Final answer
    x = 656.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.