Home / 678,136.75-1,017,382.38-393,553.73

Finding the Fourth Proportional to 678,136.75, 1,017,382.38 and 393,553.73

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Solution

The fourth proportional to 678,136.75, 1,017,382.38 and 393,553.73 is: 590,433.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,136.75 : 1,017,382.38 = 393,553.73 : x
  2. Step 2: Convert to fraction form
    678,136.75/1,017,382.38 = 393,553.73/x
  3. Step 3: Cross multiply
    678,136.75x = 1,017,382.38 × 393,553.73
  4. Step 4: Simplify right side
    678,136.75x = 400,394,632,497.87
  5. Step 5: Solve for x
    x = 400,394,632,497.87/678,136.75
  6. Step 6: Final answer
    x = 590,433.47

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.