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Finding the Fourth Proportional to 719,137.72, 992,391.76 and 396,843.60

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Solution

The fourth proportional to 719,137.72, 992,391.76 and 396,843.60 is: 547,634.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,137.72 : 992,391.76 = 396,843.60 : x
  2. Step 2: Convert to fraction form
    719,137.72/992,391.76 = 396,843.60/x
  3. Step 3: Cross multiply
    719,137.72x = 992,391.76 × 396,843.60
  4. Step 4: Simplify right side
    719,137.72x = 393,824,318,648.74
  5. Step 5: Solve for x
    x = 393,824,318,648.74/719,137.72
  6. Step 6: Final answer
    x = 547,634.07

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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.