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Finding the Fourth Proportional to 804.21, 1,115.76 and 796.92

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Solution

The fourth proportional to 804.21, 1,115.76 and 796.92 is: 1,105.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.21 : 1,115.76 = 796.92 : x
  2. Step 2: Convert to fraction form
    804.21/1,115.76 = 796.92/x
  3. Step 3: Cross multiply
    804.21x = 1,115.76 × 796.92
  4. Step 4: Simplify right side
    804.21x = 889,171.46
  5. Step 5: Solve for x
    x = 889,171.46/804.21
  6. Step 6: Final answer
    x = 1,105.65

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.