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Finding the Fourth Proportional to 331,347.70, 497,021.55 and 82,029.70

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Solution

The fourth proportional to 331,347.70, 497,021.55 and 82,029.70 is: 123,044.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,347.70 : 497,021.55 = 82,029.70 : x
  2. Step 2: Convert to fraction form
    331,347.70/497,021.55 = 82,029.70/x
  3. Step 3: Cross multiply
    331,347.70x = 497,021.55 × 82,029.70
  4. Step 4: Simplify right side
    331,347.70x = 40,770,528,640.04
  5. Step 5: Solve for x
    x = 40,770,528,640.04/331,347.70
  6. Step 6: Final answer
    x = 123,044.55

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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.