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Finding the Fourth Proportional to 662.78, 994.21 and 200.58

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Solution

The fourth proportional to 662.78, 994.21 and 200.58 is: 300.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.78 : 994.21 = 200.58 : x
  2. Step 2: Convert to fraction form
    662.78/994.21 = 200.58/x
  3. Step 3: Cross multiply
    662.78x = 994.21 × 200.58
  4. Step 4: Simplify right side
    662.78x = 199,414.41
  5. Step 5: Solve for x
    x = 199,414.41/662.78
  6. Step 6: Final answer
    x = 300.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.