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Finding the Fourth Proportional to 681,399.56, 940,267.14 and 401,953.20

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Solution

The fourth proportional to 681,399.56, 940,267.14 and 401,953.20 is: 554,657.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,399.56 : 940,267.14 = 401,953.20 : x
  2. Step 2: Convert to fraction form
    681,399.56/940,267.14 = 401,953.20/x
  3. Step 3: Cross multiply
    681,399.56x = 940,267.14 × 401,953.20
  4. Step 4: Simplify right side
    681,399.56x = 377,943,380,071.63
  5. Step 5: Solve for x
    x = 377,943,380,071.63/681,399.56
  6. Step 6: Final answer
    x = 554,657.51

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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.