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Finding the Fourth Proportional to 2,721.38, 4,082.08 and 669.38

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Solution

The fourth proportional to 2,721.38, 4,082.08 and 669.38 is: 1,004.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.38 : 4,082.08 = 669.38 : x
  2. Step 2: Convert to fraction form
    2,721.38/4,082.08 = 669.38/x
  3. Step 3: Cross multiply
    2,721.38x = 4,082.08 × 669.38
  4. Step 4: Simplify right side
    2,721.38x = 2,732,443.97
  5. Step 5: Solve for x
    x = 2,732,443.97/2,721.38
  6. Step 6: Final answer
    x = 1,004.07

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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.