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Finding the Fourth Proportional to 324,872.20, 486,660.30 and 285,905.80

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Solution

The fourth proportional to 324,872.20, 486,660.30 and 285,905.80 is: 428,288.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,872.20 : 486,660.30 = 285,905.80 : x
  2. Step 2: Convert to fraction form
    324,872.20/486,660.30 = 285,905.80/x
  3. Step 3: Cross multiply
    324,872.20x = 486,660.30 × 285,905.80
  4. Step 4: Simplify right side
    324,872.20x = 139,139,002,399.74
  5. Step 5: Solve for x
    x = 139,139,002,399.74/324,872.20
  6. Step 6: Final answer
    x = 428,288.42

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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.