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Finding the Fourth Proportional to 896.87, 1,236.96 and 697.29

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Solution

The fourth proportional to 896.87, 1,236.96 and 697.29 is: 961.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.87 : 1,236.96 = 697.29 : x
  2. Step 2: Convert to fraction form
    896.87/1,236.96 = 697.29/x
  3. Step 3: Cross multiply
    896.87x = 1,236.96 × 697.29
  4. Step 4: Simplify right side
    896.87x = 862,519.84
  5. Step 5: Solve for x
    x = 862,519.84/896.87
  6. Step 6: Final answer
    x = 961.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.