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Finding the Fourth Proportional to 440.72, 608.19 and 254.21

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Solution

The fourth proportional to 440.72, 608.19 and 254.21 is: 350.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.72 : 608.19 = 254.21 : x
  2. Step 2: Convert to fraction form
    440.72/608.19 = 254.21/x
  3. Step 3: Cross multiply
    440.72x = 608.19 × 254.21
  4. Step 4: Simplify right side
    440.72x = 154,604.94
  5. Step 5: Solve for x
    x = 154,604.94/440.72
  6. Step 6: Final answer
    x = 350.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.