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Finding the Fourth Proportional to 217,080.40, 325,620.60 and 180,216.40

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Solution

The fourth proportional to 217,080.40, 325,620.60 and 180,216.40 is: 270,324.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,080.40 : 325,620.60 = 180,216.40 : x
  2. Step 2: Convert to fraction form
    217,080.40/325,620.60 = 180,216.40/x
  3. Step 3: Cross multiply
    217,080.40x = 325,620.60 × 180,216.40
  4. Step 4: Simplify right side
    217,080.40x = 58,682,172,297.84
  5. Step 5: Solve for x
    x = 58,682,172,297.84/217,080.40
  6. Step 6: Final answer
    x = 270,324.60

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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.