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Finding the Fourth Proportional to 719,141.28, 992,435.13 and 396,871.74

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Solution

The fourth proportional to 719,141.28, 992,435.13 and 396,871.74 is: 547,694.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,141.28 : 992,435.13 = 396,871.74 : x
  2. Step 2: Convert to fraction form
    719,141.28/992,435.13 = 396,871.74/x
  3. Step 3: Cross multiply
    719,141.28x = 992,435.13 × 396,871.74
  4. Step 4: Simplify right side
    719,141.28x = 393,869,456,880.23
  5. Step 5: Solve for x
    x = 393,869,456,880.23/719,141.28
  6. Step 6: Final answer
    x = 547,694.13

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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.