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Finding the Fourth Proportional to 896.56, 1,343.52 and 691.20

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Solution

The fourth proportional to 896.56, 1,343.52 and 691.20 is: 1,035.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.56 : 1,343.52 = 691.20 : x
  2. Step 2: Convert to fraction form
    896.56/1,343.52 = 691.20/x
  3. Step 3: Cross multiply
    896.56x = 1,343.52 × 691.20
  4. Step 4: Simplify right side
    896.56x = 928,641.02
  5. Step 5: Solve for x
    x = 928,641.02/896.56
  6. Step 6: Final answer
    x = 1,035.78

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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.