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Finding the Fourth Proportional to 798.18, 1,198.21 and 635.97

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Solution

The fourth proportional to 798.18, 1,198.21 and 635.97 is: 954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.18 : 1,198.21 = 635.97 : x
  2. Step 2: Convert to fraction form
    798.18/1,198.21 = 635.97/x
  3. Step 3: Cross multiply
    798.18x = 1,198.21 × 635.97
  4. Step 4: Simplify right side
    798.18x = 762,025.61
  5. Step 5: Solve for x
    x = 762,025.61/798.18
  6. Step 6: Final answer
    x = 954.70

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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.