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Finding the Fourth Proportional to 449.42, 673.82 and 218.09

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Solution

The fourth proportional to 449.42, 673.82 and 218.09 is: 326.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.42 : 673.82 = 218.09 : x
  2. Step 2: Convert to fraction form
    449.42/673.82 = 218.09/x
  3. Step 3: Cross multiply
    449.42x = 673.82 × 218.09
  4. Step 4: Simplify right side
    449.42x = 146,948.94
  5. Step 5: Solve for x
    x = 146,948.94/449.42
  6. Step 6: Final answer
    x = 326.98

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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.