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Finding the Fourth Proportional to 285,661.49, 428,793.55 and 279,227.52

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Solution

The fourth proportional to 285,661.49, 428,793.55 and 279,227.52 is: 419,135.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,661.49 : 428,793.55 = 279,227.52 : x
  2. Step 2: Convert to fraction form
    285,661.49/428,793.55 = 279,227.52/x
  3. Step 3: Cross multiply
    285,661.49x = 428,793.55 × 279,227.52
  4. Step 4: Simplify right side
    285,661.49x = 119,730,958,860.43
  5. Step 5: Solve for x
    x = 119,730,958,860.43/285,661.49
  6. Step 6: Final answer
    x = 419,135.81

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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.