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Finding the Fourth Proportional to 5,199.92, 7,174.08 and 2,961.21

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Solution

The fourth proportional to 5,199.92, 7,174.08 and 2,961.21 is: 4,085.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,199.92 : 7,174.08 = 2,961.21 : x
  2. Step 2: Convert to fraction form
    5,199.92/7,174.08 = 2,961.21/x
  3. Step 3: Cross multiply
    5,199.92x = 7,174.08 × 2,961.21
  4. Step 4: Simplify right side
    5,199.92x = 21,243,957.44
  5. Step 5: Solve for x
    x = 21,243,957.44/5,199.92
  6. Step 6: Final answer
    x = 4,085.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.