Home / 2,660,469.80-3,990,704.70-978,780.20

Finding the Fourth Proportional to 2,660,469.80, 3,990,704.70 and 978,780.20

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Solution

The fourth proportional to 2,660,469.80, 3,990,704.70 and 978,780.20 is: 1,468,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660,469.80 : 3,990,704.70 = 978,780.20 : x
  2. Step 2: Convert to fraction form
    2,660,469.80/3,990,704.70 = 978,780.20/x
  3. Step 3: Cross multiply
    2,660,469.80x = 3,990,704.70 × 978,780.20
  4. Step 4: Simplify right side
    2,660,469.80x = 3,906,022,744,406.94
  5. Step 5: Solve for x
    x = 3,906,022,744,406.94/2,660,469.80
  6. Step 6: Final answer
    x = 1,468,170.30

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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.