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Finding the Fourth Proportional to 681,404.75, 940,338.63 and 395,090.91

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Solution

The fourth proportional to 681,404.75, 940,338.63 and 395,090.91 is: 545,225.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,404.75 : 940,338.63 = 395,090.91 : x
  2. Step 2: Convert to fraction form
    681,404.75/940,338.63 = 395,090.91/x
  3. Step 3: Cross multiply
    681,404.75x = 940,338.63 × 395,090.91
  4. Step 4: Simplify right side
    681,404.75x = 371,519,245,034.85
  5. Step 5: Solve for x
    x = 371,519,245,034.85/681,404.75
  6. Step 6: Final answer
    x = 545,225.50

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Half scale
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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.