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Finding the Fourth Proportional to 3,387.75, 5,080.47 and 1,047.44

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Solution

The fourth proportional to 3,387.75, 5,080.47 and 1,047.44 is: 1,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.75 : 5,080.47 = 1,047.44 : x
  2. Step 2: Convert to fraction form
    3,387.75/5,080.47 = 1,047.44/x
  3. Step 3: Cross multiply
    3,387.75x = 5,080.47 × 1,047.44
  4. Step 4: Simplify right side
    3,387.75x = 5,321,487.50
  5. Step 5: Solve for x
    x = 5,321,487.50/3,387.75
  6. Step 6: Final answer
    x = 1,570.80

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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.