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Finding the Fourth Proportional to 896.78, 1,338.20 and 804.85

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Solution

The fourth proportional to 896.78, 1,338.20 and 804.85 is: 1,201.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.78 : 1,338.20 = 804.85 : x
  2. Step 2: Convert to fraction form
    896.78/1,338.20 = 804.85/x
  3. Step 3: Cross multiply
    896.78x = 1,338.20 × 804.85
  4. Step 4: Simplify right side
    896.78x = 1,077,050.27
  5. Step 5: Solve for x
    x = 1,077,050.27/896.78
  6. Step 6: Final answer
    x = 1,201.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.