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Finding the Fourth Proportional to 896.16, 1,229.65 and 871.68

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Solution

The fourth proportional to 896.16, 1,229.65 and 871.68 is: 1,196.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.16 : 1,229.65 = 871.68 : x
  2. Step 2: Convert to fraction form
    896.16/1,229.65 = 871.68/x
  3. Step 3: Cross multiply
    896.16x = 1,229.65 × 871.68
  4. Step 4: Simplify right side
    896.16x = 1,071,861.31
  5. Step 5: Solve for x
    x = 1,071,861.31/896.16
  6. Step 6: Final answer
    x = 1,196.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.