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Finding the Fourth Proportional to 438.87, 605.72 and 249.81

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Solution

The fourth proportional to 438.87, 605.72 and 249.81 is: 344.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.87 : 605.72 = 249.81 : x
  2. Step 2: Convert to fraction form
    438.87/605.72 = 249.81/x
  3. Step 3: Cross multiply
    438.87x = 605.72 × 249.81
  4. Step 4: Simplify right side
    438.87x = 151,314.91
  5. Step 5: Solve for x
    x = 151,314.91/438.87
  6. Step 6: Final answer
    x = 344.78

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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.