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Finding the Fourth Proportional to 892,717.78, 1,339,149.56 and 419,144.80

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Solution

The fourth proportional to 892,717.78, 1,339,149.56 and 419,144.80 is: 628,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,717.78 : 1,339,149.56 = 419,144.80 : x
  2. Step 2: Convert to fraction form
    892,717.78/1,339,149.56 = 419,144.80/x
  3. Step 3: Cross multiply
    892,717.78x = 1,339,149.56 × 419,144.80
  4. Step 4: Simplify right side
    892,717.78x = 561,297,574,496.29
  5. Step 5: Solve for x
    x = 561,297,574,496.29/892,717.78
  6. Step 6: Final answer
    x = 628,751.42

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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.