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Finding the Fourth Proportional to 414,200.40, 621,761.40 and 256,606.80

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Solution

The fourth proportional to 414,200.40, 621,761.40 and 256,606.80 is: 385,195.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,200.40 : 621,761.40 = 256,606.80 : x
  2. Step 2: Convert to fraction form
    414,200.40/621,761.40 = 256,606.80/x
  3. Step 3: Cross multiply
    414,200.40x = 621,761.40 × 256,606.80
  4. Step 4: Simplify right side
    414,200.40x = 159,548,203,217.52
  5. Step 5: Solve for x
    x = 159,548,203,217.52/414,200.40
  6. Step 6: Final answer
    x = 385,195.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.