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Finding the Fourth Proportional to 719,489.85, 992,869.97 and 397,193.04

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Solution

The fourth proportional to 719,489.85, 992,869.97 and 397,193.04 is: 548,112.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,489.85 : 992,869.97 = 397,193.04 : x
  2. Step 2: Convert to fraction form
    719,489.85/992,869.97 = 397,193.04/x
  3. Step 3: Cross multiply
    719,489.85x = 992,869.97 × 397,193.04
  4. Step 4: Simplify right side
    719,489.85x = 394,361,039,723.04
  5. Step 5: Solve for x
    x = 394,361,039,723.04/719,489.85
  6. Step 6: Final answer
    x = 548,112.03

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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.