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Finding the Fourth Proportional to 3,661.68, 5,493.24 and 1,812.72

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Solution

The fourth proportional to 3,661.68, 5,493.24 and 1,812.72 is: 2,719.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,661.68 : 5,493.24 = 1,812.72 : x
  2. Step 2: Convert to fraction form
    3,661.68/5,493.24 = 1,812.72/x
  3. Step 3: Cross multiply
    3,661.68x = 5,493.24 × 1,812.72
  4. Step 4: Simplify right side
    3,661.68x = 9,957,706.01
  5. Step 5: Solve for x
    x = 9,957,706.01/3,661.68
  6. Step 6: Final answer
    x = 2,719.44

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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.