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Finding the Fourth Proportional to 639,137.71, 958,542.55 and 189,754.32

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Solution

The fourth proportional to 639,137.71, 958,542.55 and 189,754.32 is: 284,582.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,137.71 : 958,542.55 = 189,754.32 : x
  2. Step 2: Convert to fraction form
    639,137.71/958,542.55 = 189,754.32/x
  3. Step 3: Cross multiply
    639,137.71x = 958,542.55 × 189,754.32
  4. Step 4: Simplify right side
    639,137.71x = 181,887,589,766.32
  5. Step 5: Solve for x
    x = 181,887,589,766.32/639,137.71
  6. Step 6: Final answer
    x = 284,582.79

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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.