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Finding the Fourth Proportional to 681,078.16, 939,888.12 and 394,764.22

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Solution

The fourth proportional to 681,078.16, 939,888.12 and 394,764.22 is: 544,774.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,078.16 : 939,888.12 = 394,764.22 : x
  2. Step 2: Convert to fraction form
    681,078.16/939,888.12 = 394,764.22/x
  3. Step 3: Cross multiply
    681,078.16x = 939,888.12 × 394,764.22
  4. Step 4: Simplify right side
    681,078.16x = 371,034,200,579.07
  5. Step 5: Solve for x
    x = 371,034,200,579.07/681,078.16
  6. Step 6: Final answer
    x = 544,774.77

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Double scale
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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.