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Finding the Fourth Proportional to 994.38, 1,372.21 and 601.39

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Solution

The fourth proportional to 994.38, 1,372.21 and 601.39 is: 829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.38 : 1,372.21 = 601.39 : x
  2. Step 2: Convert to fraction form
    994.38/1,372.21 = 601.39/x
  3. Step 3: Cross multiply
    994.38x = 1,372.21 × 601.39
  4. Step 4: Simplify right side
    994.38x = 825,233.58
  5. Step 5: Solve for x
    x = 825,233.58/994.38
  6. Step 6: Final answer
    x = 829.90

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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.