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Finding the Fourth Proportional to 439.33, 606.41 and 308.37

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Solution

The fourth proportional to 439.33, 606.41 and 308.37 is: 425.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.33 : 606.41 = 308.37 : x
  2. Step 2: Convert to fraction form
    439.33/606.41 = 308.37/x
  3. Step 3: Cross multiply
    439.33x = 606.41 × 308.37
  4. Step 4: Simplify right side
    439.33x = 186,996.39
  5. Step 5: Solve for x
    x = 186,996.39/439.33
  6. Step 6: Final answer
    x = 425.64

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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.