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Finding the Fourth Proportional to 994.59, 1,372.49 and 552.49

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Solution

The fourth proportional to 994.59, 1,372.49 and 552.49 is: 762.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.59 : 1,372.49 = 552.49 : x
  2. Step 2: Convert to fraction form
    994.59/1,372.49 = 552.49/x
  3. Step 3: Cross multiply
    994.59x = 1,372.49 × 552.49
  4. Step 4: Simplify right side
    994.59x = 758,282.88
  5. Step 5: Solve for x
    x = 758,282.88/994.59
  6. Step 6: Final answer
    x = 762.41

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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.