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Finding the Fourth Proportional to 1,551.72, 2,324.49 and 727.49

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Solution

The fourth proportional to 1,551.72, 2,324.49 and 727.49 is: 1,089.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.72 : 2,324.49 = 727.49 : x
  2. Step 2: Convert to fraction form
    1,551.72/2,324.49 = 727.49/x
  3. Step 3: Cross multiply
    1,551.72x = 2,324.49 × 727.49
  4. Step 4: Simplify right side
    1,551.72x = 1,691,031.61
  5. Step 5: Solve for x
    x = 1,691,031.61/1,551.72
  6. Step 6: Final answer
    x = 1,089.78

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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.