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Finding the Fourth Proportional to 303,375.20, 455,062.80 and 81,759.20

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Solution

The fourth proportional to 303,375.20, 455,062.80 and 81,759.20 is: 122,638.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,375.20 : 455,062.80 = 81,759.20 : x
  2. Step 2: Convert to fraction form
    303,375.20/455,062.80 = 81,759.20/x
  3. Step 3: Cross multiply
    303,375.20x = 455,062.80 × 81,759.20
  4. Step 4: Simplify right side
    303,375.20x = 37,205,568,202.45
  5. Step 5: Solve for x
    x = 37,205,568,202.45/303,375.20
  6. Step 6: Final answer
    x = 122,638.79

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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.