Home / 426,148.20-639,222.30-419,149.80

Finding the Fourth Proportional to 426,148.20, 639,222.30 and 419,149.80

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Solution

The fourth proportional to 426,148.20, 639,222.30 and 419,149.80 is: 628,724.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,148.20 : 639,222.30 = 419,149.80 : x
  2. Step 2: Convert to fraction form
    426,148.20/639,222.30 = 419,149.80/x
  3. Step 3: Cross multiply
    426,148.20x = 639,222.30 × 419,149.80
  4. Step 4: Simplify right side
    426,148.20x = 267,929,899,200.54
  5. Step 5: Solve for x
    x = 267,929,899,200.54/426,148.20
  6. Step 6: Final answer
    x = 628,724.70

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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.