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Finding the Fourth Proportional to 828.20, 1,143.01 and 496.73

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Solution

The fourth proportional to 828.20, 1,143.01 and 496.73 is: 685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.20 : 1,143.01 = 496.73 : x
  2. Step 2: Convert to fraction form
    828.20/1,143.01 = 496.73/x
  3. Step 3: Cross multiply
    828.20x = 1,143.01 × 496.73
  4. Step 4: Simplify right side
    828.20x = 567,770.84
  5. Step 5: Solve for x
    x = 567,770.84/828.20
  6. Step 6: Final answer
    x = 685.55

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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.