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Finding the Fourth Proportional to 801.24, 1,199.92 and 663.27

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Solution

The fourth proportional to 801.24, 1,199.92 and 663.27 is: 993.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.24 : 1,199.92 = 663.27 : x
  2. Step 2: Convert to fraction form
    801.24/1,199.92 = 663.27/x
  3. Step 3: Cross multiply
    801.24x = 1,199.92 × 663.27
  4. Step 4: Simplify right side
    801.24x = 795,870.94
  5. Step 5: Solve for x
    x = 795,870.94/801.24
  6. Step 6: Final answer
    x = 993.30

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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.