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Finding the Fourth Proportional to 1,821.24, 2,731.92 and 667

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Solution

The fourth proportional to 1,821.24, 2,731.92 and 667 is: 1,000.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.24 : 2,731.92 = 667 : x
  2. Step 2: Convert to fraction form
    1,821.24/2,731.92 = 667/x
  3. Step 3: Cross multiply
    1,821.24x = 2,731.92 × 667
  4. Step 4: Simplify right side
    1,821.24x = 1,822,190.64
  5. Step 5: Solve for x
    x = 1,822,190.64/1,821.24
  6. Step 6: Final answer
    x = 1,000.52

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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.