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Finding the Fourth Proportional to 449.33, 673.99 and 391.82

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Solution

The fourth proportional to 449.33, 673.99 and 391.82 is: 587.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.33 : 673.99 = 391.82 : x
  2. Step 2: Convert to fraction form
    449.33/673.99 = 391.82/x
  3. Step 3: Cross multiply
    449.33x = 673.99 × 391.82
  4. Step 4: Simplify right side
    449.33x = 264,078.41
  5. Step 5: Solve for x
    x = 264,078.41/449.33
  6. Step 6: Final answer
    x = 587.72

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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.