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Finding the Fourth Proportional to 639,338.60, 959,165.76 and 190,057.56

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Solution

The fourth proportional to 639,338.60, 959,165.76 and 190,057.56 is: 285,133.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,338.60 : 959,165.76 = 190,057.56 : x
  2. Step 2: Convert to fraction form
    639,338.60/959,165.76 = 190,057.56/x
  3. Step 3: Cross multiply
    639,338.60x = 959,165.76 × 190,057.56
  4. Step 4: Simplify right side
    639,338.60x = 182,296,703,981.15
  5. Step 5: Solve for x
    x = 182,296,703,981.15/639,338.60
  6. Step 6: Final answer
    x = 285,133.27

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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.