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Finding the Fourth Proportional to 608,578.44, 839,555.46 and 393,787.78

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Solution

The fourth proportional to 608,578.44, 839,555.46 and 393,787.78 is: 543,244.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,578.44 : 839,555.46 = 393,787.78 : x
  2. Step 2: Convert to fraction form
    608,578.44/839,555.46 = 393,787.78/x
  3. Step 3: Cross multiply
    608,578.44x = 839,555.46 × 393,787.78
  4. Step 4: Simplify right side
    608,578.44x = 330,606,680,780.28
  5. Step 5: Solve for x
    x = 330,606,680,780.28/608,578.44
  6. Step 6: Final answer
    x = 543,244.16

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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.