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Finding the Fourth Proportional to 580,872.40, 870,142.20 and 331,262.80

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Solution

The fourth proportional to 580,872.40, 870,142.20 and 331,262.80 is: 496,229.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,872.40 : 870,142.20 = 331,262.80 : x
  2. Step 2: Convert to fraction form
    580,872.40/870,142.20 = 331,262.80/x
  3. Step 3: Cross multiply
    580,872.40x = 870,142.20 × 331,262.80
  4. Step 4: Simplify right side
    580,872.40x = 288,245,741,570.16
  5. Step 5: Solve for x
    x = 288,245,741,570.16/580,872.40
  6. Step 6: Final answer
    x = 496,229.02

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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.