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Finding the Fourth Proportional to 681,103.69, 940,013.30 and 440,087.18

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Solution

The fourth proportional to 681,103.69, 940,013.30 and 440,087.18 is: 607,378.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,103.69 : 940,013.30 = 440,087.18 : x
  2. Step 2: Convert to fraction form
    681,103.69/940,013.30 = 440,087.18/x
  3. Step 3: Cross multiply
    681,103.69x = 940,013.30 × 440,087.18
  4. Step 4: Simplify right side
    681,103.69x = 413,687,798,759.65
  5. Step 5: Solve for x
    x = 413,687,798,759.65/681,103.69
  6. Step 6: Final answer
    x = 607,378.59

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Double scale
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Similar ratio
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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.