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Finding the Fourth Proportional to 447.55, 667.87 and 393.56

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Solution

The fourth proportional to 447.55, 667.87 and 393.56 is: 587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.55 : 667.87 = 393.56 : x
  2. Step 2: Convert to fraction form
    447.55/667.87 = 393.56/x
  3. Step 3: Cross multiply
    447.55x = 667.87 × 393.56
  4. Step 4: Simplify right side
    447.55x = 262,846.92
  5. Step 5: Solve for x
    x = 262,846.92/447.55
  6. Step 6: Final answer
    x = 587.30

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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.