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Finding the Fourth Proportional to 719,409.78, 992,786.14 and 397,119.56

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Solution

The fourth proportional to 719,409.78, 992,786.14 and 397,119.56 is: 548,025.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,409.78 : 992,786.14 = 397,119.56 : x
  2. Step 2: Convert to fraction form
    719,409.78/992,786.14 = 397,119.56/x
  3. Step 3: Cross multiply
    719,409.78x = 992,786.14 × 397,119.56
  4. Step 4: Simplify right side
    719,409.78x = 394,254,797,324.69
  5. Step 5: Solve for x
    x = 394,254,797,324.69/719,409.78
  6. Step 6: Final answer
    x = 548,025.35

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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.