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Finding the Fourth Proportional to 411,880.80, 617,821.20 and 400,216.80

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Solution

The fourth proportional to 411,880.80, 617,821.20 and 400,216.80 is: 600,325.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,880.80 : 617,821.20 = 400,216.80 : x
  2. Step 2: Convert to fraction form
    411,880.80/617,821.20 = 400,216.80/x
  3. Step 3: Cross multiply
    411,880.80x = 617,821.20 × 400,216.80
  4. Step 4: Simplify right side
    411,880.80x = 247,262,423,636.16
  5. Step 5: Solve for x
    x = 247,262,423,636.16/411,880.80
  6. Step 6: Final answer
    x = 600,325.20

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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.