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Finding the Fourth Proportional to 994.40, 1,372.26 and 552.29

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Solution

The fourth proportional to 994.40, 1,372.26 and 552.29 is: 762.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.40 : 1,372.26 = 552.29 : x
  2. Step 2: Convert to fraction form
    994.40/1,372.26 = 552.29/x
  3. Step 3: Cross multiply
    994.40x = 1,372.26 × 552.29
  4. Step 4: Simplify right side
    994.40x = 757,882.71
  5. Step 5: Solve for x
    x = 757,882.71/994.40
  6. Step 6: Final answer
    x = 762.15

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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.