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Finding the Fourth Proportional to 324,363.20, 486,285.60 and 137,220.80

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Solution

The fourth proportional to 324,363.20, 486,285.60 and 137,220.80 is: 205,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,363.20 : 486,285.60 = 137,220.80 : x
  2. Step 2: Convert to fraction form
    324,363.20/486,285.60 = 137,220.80/x
  3. Step 3: Cross multiply
    324,363.20x = 486,285.60 × 137,220.80
  4. Step 4: Simplify right side
    324,363.20x = 66,728,499,060.48
  5. Step 5: Solve for x
    x = 66,728,499,060.48/324,363.20
  6. Step 6: Final answer
    x = 205,721.55

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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.