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Finding the Fourth Proportional to 994.27, 1,372.09 and 552.17

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Solution

The fourth proportional to 994.27, 1,372.09 and 552.17 is: 761.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.27 : 1,372.09 = 552.17 : x
  2. Step 2: Convert to fraction form
    994.27/1,372.09 = 552.17/x
  3. Step 3: Cross multiply
    994.27x = 1,372.09 × 552.17
  4. Step 4: Simplify right side
    994.27x = 757,618.69
  5. Step 5: Solve for x
    x = 757,618.69/994.27
  6. Step 6: Final answer
    x = 761.99

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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.