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Finding the Fourth Proportional to 681,405.25, 940,339.32 and 395,091.41

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Solution

The fourth proportional to 681,405.25, 940,339.32 and 395,091.41 is: 545,226.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,405.25 : 940,339.32 = 395,091.41 : x
  2. Step 2: Convert to fraction form
    681,405.25/940,339.32 = 395,091.41/x
  3. Step 3: Cross multiply
    681,405.25x = 940,339.32 × 395,091.41
  4. Step 4: Simplify right side
    681,405.25x = 371,519,983,115.55
  5. Step 5: Solve for x
    x = 371,519,983,115.55/681,405.25
  6. Step 6: Final answer
    x = 545,226.18

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1.5x scale

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.