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Finding the Fourth Proportional to 681,953.48, 940,911.18 and 387,599.12

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Solution

The fourth proportional to 681,953.48, 940,911.18 and 387,599.12 is: 534,781.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,953.48 : 940,911.18 = 387,599.12 : x
  2. Step 2: Convert to fraction form
    681,953.48/940,911.18 = 387,599.12/x
  3. Step 3: Cross multiply
    681,953.48x = 940,911.18 × 387,599.12
  4. Step 4: Simplify right side
    681,953.48x = 364,696,345,366.16
  5. Step 5: Solve for x
    x = 364,696,345,366.16/681,953.48
  6. Step 6: Final answer
    x = 534,781.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.