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Finding the Fourth Proportional to 439.08, 605.29 and 273.21

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Solution

The fourth proportional to 439.08, 605.29 and 273.21 is: 376.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.08 : 605.29 = 273.21 : x
  2. Step 2: Convert to fraction form
    439.08/605.29 = 273.21/x
  3. Step 3: Cross multiply
    439.08x = 605.29 × 273.21
  4. Step 4: Simplify right side
    439.08x = 165,371.28
  5. Step 5: Solve for x
    x = 165,371.28/439.08
  6. Step 6: Final answer
    x = 376.63

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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.