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Finding the Fourth Proportional to 447.99, 672.21 and 216.96

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Solution

The fourth proportional to 447.99, 672.21 and 216.96 is: 325.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.99 : 672.21 = 216.96 : x
  2. Step 2: Convert to fraction form
    447.99/672.21 = 216.96/x
  3. Step 3: Cross multiply
    447.99x = 672.21 × 216.96
  4. Step 4: Simplify right side
    447.99x = 145,842.68
  5. Step 5: Solve for x
    x = 145,842.68/447.99
  6. Step 6: Final answer
    x = 325.55

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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.