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Finding the Fourth Proportional to 439.43, 606.49 and 271.42

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Solution

The fourth proportional to 439.43, 606.49 and 271.42 is: 374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.43 : 606.49 = 271.42 : x
  2. Step 2: Convert to fraction form
    439.43/606.49 = 271.42/x
  3. Step 3: Cross multiply
    439.43x = 606.49 × 271.42
  4. Step 4: Simplify right side
    439.43x = 164,611.32
  5. Step 5: Solve for x
    x = 164,611.32/439.43
  6. Step 6: Final answer
    x = 374.61

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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.