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Finding the Fourth Proportional to 719,086.31, 992,310.11 and 396,792.23

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Solution

The fourth proportional to 719,086.31, 992,310.11 and 396,792.23 is: 547,557.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,086.31 : 992,310.11 = 396,792.23 : x
  2. Step 2: Convert to fraction form
    719,086.31/992,310.11 = 396,792.23/x
  3. Step 3: Cross multiply
    719,086.31x = 992,310.11 × 396,792.23
  4. Step 4: Simplify right side
    719,086.31x = 393,740,935,940.91
  5. Step 5: Solve for x
    x = 393,740,935,940.91/719,086.31
  6. Step 6: Final answer
    x = 547,557.27

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Half scale
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Double scale
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Similar ratio
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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.