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Finding the Fourth Proportional to 799.52, 1,198.80 and 645.44

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Solution

The fourth proportional to 799.52, 1,198.80 and 645.44 is: 967.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.52 : 1,198.80 = 645.44 : x
  2. Step 2: Convert to fraction form
    799.52/1,198.80 = 645.44/x
  3. Step 3: Cross multiply
    799.52x = 1,198.80 × 645.44
  4. Step 4: Simplify right side
    799.52x = 773,753.47
  5. Step 5: Solve for x
    x = 773,753.47/799.52
  6. Step 6: Final answer
    x = 967.77

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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.