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Finding the Fourth Proportional to 680,466.88, 938,983.20 and 394,006.36

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Solution

The fourth proportional to 680,466.88, 938,983.20 and 394,006.36 is: 543,693.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,466.88 : 938,983.20 = 394,006.36 : x
  2. Step 2: Convert to fraction form
    680,466.88/938,983.20 = 394,006.36/x
  3. Step 3: Cross multiply
    680,466.88x = 938,983.20 × 394,006.36
  4. Step 4: Simplify right side
    680,466.88x = 369,965,352,733.15
  5. Step 5: Solve for x
    x = 369,965,352,733.15/680,466.88
  6. Step 6: Final answer
    x = 543,693.40

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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.