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Finding the Fourth Proportional to 259,436.80, 388,863.60 and 133,028.20

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Solution

The fourth proportional to 259,436.80, 388,863.60 and 133,028.20 is: 199,392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,436.80 : 388,863.60 = 133,028.20 : x
  2. Step 2: Convert to fraction form
    259,436.80/388,863.60 = 133,028.20/x
  3. Step 3: Cross multiply
    259,436.80x = 388,863.60 × 133,028.20
  4. Step 4: Simplify right side
    259,436.80x = 51,729,824,753.52
  5. Step 5: Solve for x
    x = 51,729,824,753.52/259,436.80
  6. Step 6: Final answer
    x = 199,392.78

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1.5x scale

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.