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Finding the Fourth Proportional to 2,721.54, 4,082.45 and 773.89

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Solution

The fourth proportional to 2,721.54, 4,082.45 and 773.89 is: 1,160.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.54 : 4,082.45 = 773.89 : x
  2. Step 2: Convert to fraction form
    2,721.54/4,082.45 = 773.89/x
  3. Step 3: Cross multiply
    2,721.54x = 4,082.45 × 773.89
  4. Step 4: Simplify right side
    2,721.54x = 3,159,363.36
  5. Step 5: Solve for x
    x = 3,159,363.36/2,721.54
  6. Step 6: Final answer
    x = 1,160.88

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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.