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Finding the Fourth Proportional to 681,066.24, 939,871.40 and 394,752.40

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Solution

The fourth proportional to 681,066.24, 939,871.40 and 394,752.40 is: 544,758.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,066.24 : 939,871.40 = 394,752.40 : x
  2. Step 2: Convert to fraction form
    681,066.24/939,871.40 = 394,752.40/x
  3. Step 3: Cross multiply
    681,066.24x = 939,871.40 × 394,752.40
  4. Step 4: Simplify right side
    681,066.24x = 371,016,490,841.36
  5. Step 5: Solve for x
    x = 371,016,490,841.36/681,066.24
  6. Step 6: Final answer
    x = 544,758.31

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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.