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Finding the Fourth Proportional to 538,986.45, 809,040.44 and 396,992.06

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Solution

The fourth proportional to 538,986.45, 809,040.44 and 396,992.06 is: 595,901.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,986.45 : 809,040.44 = 396,992.06 : x
  2. Step 2: Convert to fraction form
    538,986.45/809,040.44 = 396,992.06/x
  3. Step 3: Cross multiply
    538,986.45x = 809,040.44 × 396,992.06
  4. Step 4: Simplify right side
    538,986.45x = 321,182,627,902.65
  5. Step 5: Solve for x
    x = 321,182,627,902.65/538,986.45
  6. Step 6: Final answer
    x = 595,901.12

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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.