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Finding the Fourth Proportional to 3,691, 5,538.21 and 1,715.37

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Solution

The fourth proportional to 3,691, 5,538.21 and 1,715.37 is: 2,573.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,691 : 5,538.21 = 1,715.37 : x
  2. Step 2: Convert to fraction form
    3,691/5,538.21 = 1,715.37/x
  3. Step 3: Cross multiply
    3,691x = 5,538.21 × 1,715.37
  4. Step 4: Simplify right side
    3,691x = 9,500,079.29
  5. Step 5: Solve for x
    x = 9,500,079.29/3,691
  6. Step 6: Final answer
    x = 2,573.85

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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.