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Finding the Fourth Proportional to 681,417.55, 940,356.30 and 395,103.73

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Solution

The fourth proportional to 681,417.55, 940,356.30 and 395,103.73 is: 545,243.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,417.55 : 940,356.30 = 395,103.73 : x
  2. Step 2: Convert to fraction form
    681,417.55/940,356.30 = 395,103.73/x
  3. Step 3: Cross multiply
    681,417.55x = 940,356.30 × 395,103.73
  4. Step 4: Simplify right side
    681,417.55x = 371,538,281,659.00
  5. Step 5: Solve for x
    x = 371,538,281,659.00/681,417.55
  6. Step 6: Final answer
    x = 545,243.19

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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.