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Finding the Third Proportional to 1,388 and 3,008

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Solution

The third proportional to 1,388 and 3,008 is: 6,518.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388 : 3,008 = 3,008 : x
  2. Step 2: Convert to fraction form
    1,388/3,008 = 3,008/x
  3. Step 3: Cross multiply
    1,388x = 3,008 × 3,008
  4. Step 4: Simplify right side
    1,388x = 9,048,064
  5. Step 5: Solve for x
    x = 9,048,064/1,388
  6. Step 6: Final answer
    x = 6,518.78

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.