Home / 426,121.70-639,182.55-419,123.30

Finding the Fourth Proportional to 426,121.70, 639,182.55 and 419,123.30

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Solution

The fourth proportional to 426,121.70, 639,182.55 and 419,123.30 is: 628,684.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,121.70 : 639,182.55 = 419,123.30 : x
  2. Step 2: Convert to fraction form
    426,121.70/639,182.55 = 419,123.30/x
  3. Step 3: Cross multiply
    426,121.70x = 639,182.55 × 419,123.30
  4. Step 4: Simplify right side
    426,121.70x = 267,896,299,658.42
  5. Step 5: Solve for x
    x = 267,896,299,658.42/426,121.70
  6. Step 6: Final answer
    x = 628,684.95

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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.