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Finding the Fourth Proportional to 996.19, 1,373.48 and 681

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Solution

The fourth proportional to 996.19, 1,373.48 and 681 is: 938.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.19 : 1,373.48 = 681 : x
  2. Step 2: Convert to fraction form
    996.19/1,373.48 = 681/x
  3. Step 3: Cross multiply
    996.19x = 1,373.48 × 681
  4. Step 4: Simplify right side
    996.19x = 935,336.48
  5. Step 5: Solve for x
    x = 935,336.48/996.19
  6. Step 6: Final answer
    x = 938.92

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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.