Home / 419,280,920.20-628,921,380.30-128,147,480.20

Finding the Fourth Proportional to 419,280,920.20, 628,921,380.30 and 128,147,480.20

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Solution

The fourth proportional to 419,280,920.20, 628,921,380.30 and 128,147,480.20 is: 192,221,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,280,920.20 : 628,921,380.30 = 128,147,480.20 : x
  2. Step 2: Convert to fraction form
    419,280,920.20/628,921,380.30 = 128,147,480.20/x
  3. Step 3: Cross multiply
    419,280,920.20x = 628,921,380.30 × 128,147,480.20
  4. Step 4: Simplify right side
    419,280,920.20x = 80,594,690,129,350,912
  5. Step 5: Solve for x
    x = 80,594,690,129,350,912/419,280,920.20
  6. Step 6: Final answer
    x = 192,221,220.30

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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.