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Finding the Fourth Proportional to 896.73, 1,345.26 and 311.70

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Solution

The fourth proportional to 896.73, 1,345.26 and 311.70 is: 467.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.73 : 1,345.26 = 311.70 : x
  2. Step 2: Convert to fraction form
    896.73/1,345.26 = 311.70/x
  3. Step 3: Cross multiply
    896.73x = 1,345.26 × 311.70
  4. Step 4: Simplify right side
    896.73x = 419,317.54
  5. Step 5: Solve for x
    x = 419,317.54/896.73
  6. Step 6: Final answer
    x = 467.61

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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.