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Finding the Fourth Proportional to 449.51, 673.79 and 254.21

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Solution

The fourth proportional to 449.51, 673.79 and 254.21 is: 381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.51 : 673.79 = 254.21 : x
  2. Step 2: Convert to fraction form
    449.51/673.79 = 254.21/x
  3. Step 3: Cross multiply
    449.51x = 673.79 × 254.21
  4. Step 4: Simplify right side
    449.51x = 171,279.52
  5. Step 5: Solve for x
    x = 171,279.52/449.51
  6. Step 6: Final answer
    x = 381.04

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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.