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Finding the Fourth Proportional to 827.90, 1,142.49 and 496.22

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Solution

The fourth proportional to 827.90, 1,142.49 and 496.22 is: 684.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.90 : 1,142.49 = 496.22 : x
  2. Step 2: Convert to fraction form
    827.90/1,142.49 = 496.22/x
  3. Step 3: Cross multiply
    827.90x = 1,142.49 × 496.22
  4. Step 4: Simplify right side
    827.90x = 566,926.39
  5. Step 5: Solve for x
    x = 566,926.39/827.90
  6. Step 6: Final answer
    x = 684.78

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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.