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Finding the Fourth Proportional to 994.43, 1,372.39 and 552.41

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Solution

The fourth proportional to 994.43, 1,372.39 and 552.41 is: 762.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.43 : 1,372.39 = 552.41 : x
  2. Step 2: Convert to fraction form
    994.43/1,372.39 = 552.41/x
  3. Step 3: Cross multiply
    994.43x = 1,372.39 × 552.41
  4. Step 4: Simplify right side
    994.43x = 758,121.97
  5. Step 5: Solve for x
    x = 758,121.97/994.43
  6. Step 6: Final answer
    x = 762.37

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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.