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Finding the Fourth Proportional to 719,308.28, 992,574.69 and 396,997.61

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Solution

The fourth proportional to 719,308.28, 992,574.69 and 396,997.61 is: 547,817.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,308.28 : 992,574.69 = 396,997.61 : x
  2. Step 2: Convert to fraction form
    719,308.28/992,574.69 = 396,997.61/x
  3. Step 3: Cross multiply
    719,308.28x = 992,574.69 × 396,997.61
  4. Step 4: Simplify right side
    719,308.28x = 394,049,774,713.62
  5. Step 5: Solve for x
    x = 394,049,774,713.62/719,308.28
  6. Step 6: Final answer
    x = 547,817.66

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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.