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Finding the Fourth Proportional to 798.74, 1,198.11 and 250.91

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Solution

The fourth proportional to 798.74, 1,198.11 and 250.91 is: 376.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.74 : 1,198.11 = 250.91 : x
  2. Step 2: Convert to fraction form
    798.74/1,198.11 = 250.91/x
  3. Step 3: Cross multiply
    798.74x = 1,198.11 × 250.91
  4. Step 4: Simplify right side
    798.74x = 300,611.79
  5. Step 5: Solve for x
    x = 300,611.79/798.74
  6. Step 6: Final answer
    x = 376.36

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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.