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Finding the Fourth Proportional to 331,690.60, 497,535.54 and 82,372.60

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Solution

The fourth proportional to 331,690.60, 497,535.54 and 82,372.60 is: 123,558.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,690.60 : 497,535.54 = 82,372.60 : x
  2. Step 2: Convert to fraction form
    331,690.60/497,535.54 = 82,372.60/x
  3. Step 3: Cross multiply
    331,690.60x = 497,535.54 × 82,372.60
  4. Step 4: Simplify right side
    331,690.60x = 40,983,296,022.20
  5. Step 5: Solve for x
    x = 40,983,296,022.20/331,690.60
  6. Step 6: Final answer
    x = 123,558.81

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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.