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Finding the Fourth Proportional to 2,489.30, 3,734 and 822.88

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Solution

The fourth proportional to 2,489.30, 3,734 and 822.88 is: 1,234.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.30 : 3,734 = 822.88 : x
  2. Step 2: Convert to fraction form
    2,489.30/3,734 = 822.88/x
  3. Step 3: Cross multiply
    2,489.30x = 3,734 × 822.88
  4. Step 4: Simplify right side
    2,489.30x = 3,072,633.92
  5. Step 5: Solve for x
    x = 3,072,633.92/2,489.30
  6. Step 6: Final answer
    x = 1,234.34

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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.