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Finding the Fourth Proportional to 398,163.52, 597,329.28 and 131,908.80

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Solution

The fourth proportional to 398,163.52, 597,329.28 and 131,908.80 is: 197,891.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,163.52 : 597,329.28 = 131,908.80 : x
  2. Step 2: Convert to fraction form
    398,163.52/597,329.28 = 131,908.80/x
  3. Step 3: Cross multiply
    398,163.52x = 597,329.28 × 131,908.80
  4. Step 4: Simplify right side
    398,163.52x = 78,792,988,529.66
  5. Step 5: Solve for x
    x = 78,792,988,529.66/398,163.52
  6. Step 6: Final answer
    x = 197,891.03

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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.