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Finding the Fourth Proportional to 447.89, 672.14 and 216.89

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Solution

The fourth proportional to 447.89, 672.14 and 216.89 is: 325.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.89 : 672.14 = 216.89 : x
  2. Step 2: Convert to fraction form
    447.89/672.14 = 216.89/x
  3. Step 3: Cross multiply
    447.89x = 672.14 × 216.89
  4. Step 4: Simplify right side
    447.89x = 145,777.63
  5. Step 5: Solve for x
    x = 145,777.63/447.89
  6. Step 6: Final answer
    x = 325.48

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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.