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Finding the Fourth Proportional to 621,660.54, 857,890.09 and 349,728.36

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Solution

The fourth proportional to 621,660.54, 857,890.09 and 349,728.36 is: 482,624.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,660.54 : 857,890.09 = 349,728.36 : x
  2. Step 2: Convert to fraction form
    621,660.54/857,890.09 = 349,728.36/x
  3. Step 3: Cross multiply
    621,660.54x = 857,890.09 × 349,728.36
  4. Step 4: Simplify right side
    621,660.54x = 300,028,491,456.03
  5. Step 5: Solve for x
    x = 300,028,491,456.03/621,660.54
  6. Step 6: Final answer
    x = 482,624.31

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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.