Home / 426,125.70-639,188.55-419,127.30

Finding the Fourth Proportional to 426,125.70, 639,188.55 and 419,127.30

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Solution

The fourth proportional to 426,125.70, 639,188.55 and 419,127.30 is: 628,690.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,125.70 : 639,188.55 = 419,127.30 : x
  2. Step 2: Convert to fraction form
    426,125.70/639,188.55 = 419,127.30/x
  3. Step 3: Cross multiply
    426,125.70x = 639,188.55 × 419,127.30
  4. Step 4: Simplify right side
    426,125.70x = 267,901,371,152.42
  5. Step 5: Solve for x
    x = 267,901,371,152.42/426,125.70
  6. Step 6: Final answer
    x = 628,690.95

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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.