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Finding the Fourth Proportional to 414,640.80, 621,500.40 and 177,943.20

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Solution

The fourth proportional to 414,640.80, 621,500.40 and 177,943.20 is: 266,717.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,640.80 : 621,500.40 = 177,943.20 : x
  2. Step 2: Convert to fraction form
    414,640.80/621,500.40 = 177,943.20/x
  3. Step 3: Cross multiply
    414,640.80x = 621,500.40 × 177,943.20
  4. Step 4: Simplify right side
    414,640.80x = 110,591,769,977.28
  5. Step 5: Solve for x
    x = 110,591,769,977.28/414,640.80
  6. Step 6: Final answer
    x = 266,717.05

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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.