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Finding the Fourth Proportional to 5,736.80, 8,605.20 and 2,043.20

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Solution

The fourth proportional to 5,736.80, 8,605.20 and 2,043.20 is: 3,064.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,736.80 : 8,605.20 = 2,043.20 : x
  2. Step 2: Convert to fraction form
    5,736.80/8,605.20 = 2,043.20/x
  3. Step 3: Cross multiply
    5,736.80x = 8,605.20 × 2,043.20
  4. Step 4: Simplify right side
    5,736.80x = 17,582,144.64
  5. Step 5: Solve for x
    x = 17,582,144.64/5,736.80
  6. Step 6: Final answer
    x = 3,064.80

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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.