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Finding the Fourth Proportional to 411,197.20, 617,832.60 and 261,509.20

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Solution

The fourth proportional to 411,197.20, 617,832.60 and 261,509.20 is: 392,923.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,197.20 : 617,832.60 = 261,509.20 : x
  2. Step 2: Convert to fraction form
    411,197.20/617,832.60 = 261,509.20/x
  3. Step 3: Cross multiply
    411,197.20x = 617,832.60 × 261,509.20
  4. Step 4: Simplify right side
    411,197.20x = 161,568,908,959.92
  5. Step 5: Solve for x
    x = 161,568,908,959.92/411,197.20
  6. Step 6: Final answer
    x = 392,923.17

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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.