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Finding the Fourth Proportional to 2,747.36, 4,121.12 and 800

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Solution

The fourth proportional to 2,747.36, 4,121.12 and 800 is: 1,200.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.36 : 4,121.12 = 800 : x
  2. Step 2: Convert to fraction form
    2,747.36/4,121.12 = 800/x
  3. Step 3: Cross multiply
    2,747.36x = 4,121.12 × 800
  4. Step 4: Simplify right side
    2,747.36x = 3,296,896
  5. Step 5: Solve for x
    x = 3,296,896/2,747.36
  6. Step 6: Final answer
    x = 1,200.02

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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.