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Finding the Fourth Proportional to 719,263.69, 992,578.99 and 396,973.78

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Solution

The fourth proportional to 719,263.69, 992,578.99 and 396,973.78 is: 547,821.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,263.69 : 992,578.99 = 396,973.78 : x
  2. Step 2: Convert to fraction form
    719,263.69/992,578.99 = 396,973.78/x
  3. Step 3: Cross multiply
    719,263.69x = 992,578.99 × 396,973.78
  4. Step 4: Simplify right side
    719,263.69x = 394,027,833,608.88
  5. Step 5: Solve for x
    x = 394,027,833,608.88/719,263.69
  6. Step 6: Final answer
    x = 547,821.11

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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.