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Finding the Fourth Proportional to 439.47, 606.31 and 338.56

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Solution

The fourth proportional to 439.47, 606.31 and 338.56 is: 467.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.47 : 606.31 = 338.56 : x
  2. Step 2: Convert to fraction form
    439.47/606.31 = 338.56/x
  3. Step 3: Cross multiply
    439.47x = 606.31 × 338.56
  4. Step 4: Simplify right side
    439.47x = 205,267.59
  5. Step 5: Solve for x
    x = 205,267.59/439.47
  6. Step 6: Final answer
    x = 467.08

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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.