Home / 426,104.20-639,156.30-419,105.80

Finding the Fourth Proportional to 426,104.20, 639,156.30 and 419,105.80

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Solution

The fourth proportional to 426,104.20, 639,156.30 and 419,105.80 is: 628,658.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,104.20 : 639,156.30 = 419,105.80 : x
  2. Step 2: Convert to fraction form
    426,104.20/639,156.30 = 419,105.80/x
  3. Step 3: Cross multiply
    426,104.20x = 639,156.30 × 419,105.80
  4. Step 4: Simplify right side
    426,104.20x = 267,874,112,436.54
  5. Step 5: Solve for x
    x = 267,874,112,436.54/426,104.20
  6. Step 6: Final answer
    x = 628,658.70

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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.