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Finding the Fourth Proportional to 449.26, 673.14 and 318.61

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Solution

The fourth proportional to 449.26, 673.14 and 318.61 is: 477.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.26 : 673.14 = 318.61 : x
  2. Step 2: Convert to fraction form
    449.26/673.14 = 318.61/x
  3. Step 3: Cross multiply
    449.26x = 673.14 × 318.61
  4. Step 4: Simplify right side
    449.26x = 214,469.14
  5. Step 5: Solve for x
    x = 214,469.14/449.26
  6. Step 6: Final answer
    x = 477.38

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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.