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Finding the Fourth Proportional to 2,691.72, 3,715.02 and 1,644.48

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Solution

The fourth proportional to 2,691.72, 3,715.02 and 1,644.48 is: 2,269.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.72 : 3,715.02 = 1,644.48 : x
  2. Step 2: Convert to fraction form
    2,691.72/3,715.02 = 1,644.48/x
  3. Step 3: Cross multiply
    2,691.72x = 3,715.02 × 1,644.48
  4. Step 4: Simplify right side
    2,691.72x = 6,109,276.09
  5. Step 5: Solve for x
    x = 6,109,276.09/2,691.72
  6. Step 6: Final answer
    x = 2,269.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.