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Finding the Fourth Proportional to 438.68, 605.31 and 249.65

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Solution

The fourth proportional to 438.68, 605.31 and 249.65 is: 344.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.68 : 605.31 = 249.65 : x
  2. Step 2: Convert to fraction form
    438.68/605.31 = 249.65/x
  3. Step 3: Cross multiply
    438.68x = 605.31 × 249.65
  4. Step 4: Simplify right side
    438.68x = 151,112.61
  5. Step 5: Solve for x
    x = 151,112.61/438.68
  6. Step 6: Final answer
    x = 344.48

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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.