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Finding the Fourth Proportional to 492,198.38, 679,383.88 and 285,519.00

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Solution

The fourth proportional to 492,198.38, 679,383.88 and 285,519.00 is: 394,103.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,198.38 : 679,383.88 = 285,519.00 : x
  2. Step 2: Convert to fraction form
    492,198.38/679,383.88 = 285,519.00/x
  3. Step 3: Cross multiply
    492,198.38x = 679,383.88 × 285,519.00
  4. Step 4: Simplify right side
    492,198.38x = 193,977,002,636.80
  5. Step 5: Solve for x
    x = 193,977,002,636.80/492,198.38
  6. Step 6: Final answer
    x = 394,103.30

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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.