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Finding the Fourth Proportional to 2,208.72, 3,313.22 and 728.04

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Solution

The fourth proportional to 2,208.72, 3,313.22 and 728.04 is: 1,092.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.72 : 3,313.22 = 728.04 : x
  2. Step 2: Convert to fraction form
    2,208.72/3,313.22 = 728.04/x
  3. Step 3: Cross multiply
    2,208.72x = 3,313.22 × 728.04
  4. Step 4: Simplify right side
    2,208.72x = 2,412,156.69
  5. Step 5: Solve for x
    x = 2,412,156.69/2,208.72
  6. Step 6: Final answer
    x = 1,092.11

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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.