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Finding the Fourth Proportional to 640,863.77, 961,873.45 and 341,593.61

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Solution

The fourth proportional to 640,863.77, 961,873.45 and 341,593.61 is: 512,698.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,863.77 : 961,873.45 = 341,593.61 : x
  2. Step 2: Convert to fraction form
    640,863.77/961,873.45 = 341,593.61/x
  3. Step 3: Cross multiply
    640,863.77x = 961,873.45 × 341,593.61
  4. Step 4: Simplify right side
    640,863.77x = 328,569,818,485.30
  5. Step 5: Solve for x
    x = 328,569,818,485.30/640,863.77
  6. Step 6: Final answer
    x = 512,698.39

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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.