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Finding the Fourth Proportional to 492,198.75, 679,384.40 and 285,519.37

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Solution

The fourth proportional to 492,198.75, 679,384.40 and 285,519.37 is: 394,103.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,198.75 : 679,384.40 = 285,519.37 : x
  2. Step 2: Convert to fraction form
    492,198.75/679,384.40 = 285,519.37/x
  3. Step 3: Cross multiply
    492,198.75x = 679,384.40 × 285,519.37
  4. Step 4: Simplify right side
    492,198.75x = 193,977,405,875.83
  5. Step 5: Solve for x
    x = 193,977,405,875.83/492,198.75
  6. Step 6: Final answer
    x = 394,103.82

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1.5x scale

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.