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Finding the Third Proportional to 3,578 and 5,388

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Solution

The third proportional to 3,578 and 5,388 is: 8,113.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578 : 5,388 = 5,388 : x
  2. Step 2: Convert to fraction form
    3,578/5,388 = 5,388/x
  3. Step 3: Cross multiply
    3,578x = 5,388 × 5,388
  4. Step 4: Simplify right side
    3,578x = 29,030,544
  5. Step 5: Solve for x
    x = 29,030,544/3,578
  6. Step 6: Final answer
    x = 8,113.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.