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Finding the Fourth Proportional to 996.73, 1,372.61 and 993.69

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Solution

The fourth proportional to 996.73, 1,372.61 and 993.69 is: 1,368.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.73 : 1,372.61 = 993.69 : x
  2. Step 2: Convert to fraction form
    996.73/1,372.61 = 993.69/x
  3. Step 3: Cross multiply
    996.73x = 1,372.61 × 993.69
  4. Step 4: Simplify right side
    996.73x = 1,363,951.32
  5. Step 5: Solve for x
    x = 1,363,951.32/996.73
  6. Step 6: Final answer
    x = 1,368.43

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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.