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Finding the Fourth Proportional to 681,018.66, 939,663.18 and 394,521.66

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Solution

The fourth proportional to 681,018.66, 939,663.18 and 394,521.66 is: 544,357.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,018.66 : 939,663.18 = 394,521.66 : x
  2. Step 2: Convert to fraction form
    681,018.66/939,663.18 = 394,521.66/x
  3. Step 3: Cross multiply
    681,018.66x = 939,663.18 × 394,521.66
  4. Step 4: Simplify right side
    681,018.66x = 370,717,477,614.48
  5. Step 5: Solve for x
    x = 370,717,477,614.48/681,018.66
  6. Step 6: Final answer
    x = 544,357.30

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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.