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Finding the Fourth Proportional to 681,856.80, 940,880.25 and 391,452.36

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Solution

The fourth proportional to 681,856.80, 940,880.25 and 391,452.36 is: 540,157.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,856.80 : 940,880.25 = 391,452.36 : x
  2. Step 2: Convert to fraction form
    681,856.80/940,880.25 = 391,452.36/x
  3. Step 3: Cross multiply
    681,856.80x = 940,880.25 × 391,452.36
  4. Step 4: Simplify right side
    681,856.80x = 368,309,794,339.89
  5. Step 5: Solve for x
    x = 368,309,794,339.89/681,856.80
  6. Step 6: Final answer
    x = 540,157.10

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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.