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Finding the Fourth Proportional to 828.78, 1,243.69 and 482.27

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Solution

The fourth proportional to 828.78, 1,243.69 and 482.27 is: 723.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.78 : 1,243.69 = 482.27 : x
  2. Step 2: Convert to fraction form
    828.78/1,243.69 = 482.27/x
  3. Step 3: Cross multiply
    828.78x = 1,243.69 × 482.27
  4. Step 4: Simplify right side
    828.78x = 599,793.95
  5. Step 5: Solve for x
    x = 599,793.95/828.78
  6. Step 6: Final answer
    x = 723.71

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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.