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Finding the Fourth Proportional to 7,474.88, 11,215.20 and 3,368

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Solution

The fourth proportional to 7,474.88, 11,215.20 and 3,368 is: 5,053.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,474.88 : 11,215.20 = 3,368 : x
  2. Step 2: Convert to fraction form
    7,474.88/11,215.20 = 3,368/x
  3. Step 3: Cross multiply
    7,474.88x = 11,215.20 × 3,368
  4. Step 4: Simplify right side
    7,474.88x = 37,772,793.60
  5. Step 5: Solve for x
    x = 37,772,793.60/7,474.88
  6. Step 6: Final answer
    x = 5,053.30

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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.