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Finding the Fourth Proportional to 3,579.65, 5,371.07 and 1,388.55

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Solution

The fourth proportional to 3,579.65, 5,371.07 and 1,388.55 is: 2,083.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.65 : 5,371.07 = 1,388.55 : x
  2. Step 2: Convert to fraction form
    3,579.65/5,371.07 = 1,388.55/x
  3. Step 3: Cross multiply
    3,579.65x = 5,371.07 × 1,388.55
  4. Step 4: Simplify right side
    3,579.65x = 7,458,002.72
  5. Step 5: Solve for x
    x = 7,458,002.72/3,579.65
  6. Step 6: Final answer
    x = 2,083.44

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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.