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Finding the Fourth Proportional to 681,148.17, 940,013.64 and 379,342.17

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Solution

The fourth proportional to 681,148.17, 940,013.64 and 379,342.17 is: 523,508.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,148.17 : 940,013.64 = 379,342.17 : x
  2. Step 2: Convert to fraction form
    681,148.17/940,013.64 = 379,342.17/x
  3. Step 3: Cross multiply
    681,148.17x = 940,013.64 × 379,342.17
  4. Step 4: Simplify right side
    681,148.17x = 356,586,814,027.20
  5. Step 5: Solve for x
    x = 356,586,814,027.20/681,148.17
  6. Step 6: Final answer
    x = 523,508.44

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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.