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Finding the Fourth Proportional to 680,020.82, 938,370.84 and 393,558.62

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Solution

The fourth proportional to 680,020.82, 938,370.84 and 393,558.62 is: 543,077.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,020.82 : 938,370.84 = 393,558.62 : x
  2. Step 2: Convert to fraction form
    680,020.82/938,370.84 = 393,558.62/x
  3. Step 3: Cross multiply
    680,020.82x = 938,370.84 × 393,558.62
  4. Step 4: Simplify right side
    680,020.82x = 369,303,932,838.64
  5. Step 5: Solve for x
    x = 369,303,932,838.64/680,020.82
  6. Step 6: Final answer
    x = 543,077.39

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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.