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Finding the Fourth Proportional to 439.01, 605.37 and 394.94

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Solution

The fourth proportional to 439.01, 605.37 and 394.94 is: 544.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.01 : 605.37 = 394.94 : x
  2. Step 2: Convert to fraction form
    439.01/605.37 = 394.94/x
  3. Step 3: Cross multiply
    439.01x = 605.37 × 394.94
  4. Step 4: Simplify right side
    439.01x = 239,081.80
  5. Step 5: Solve for x
    x = 239,081.80/439.01
  6. Step 6: Final answer
    x = 544.60

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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.