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Finding the Fourth Proportional to 994.61, 1,372.68 and 552.56

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Solution

The fourth proportional to 994.61, 1,372.68 and 552.56 is: 762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.61 : 1,372.68 = 552.56 : x
  2. Step 2: Convert to fraction form
    994.61/1,372.68 = 552.56/x
  3. Step 3: Cross multiply
    994.61x = 1,372.68 × 552.56
  4. Step 4: Simplify right side
    994.61x = 758,481.20
  5. Step 5: Solve for x
    x = 758,481.20/994.61
  6. Step 6: Final answer
    x = 762.59

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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.