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Finding the Third Proportional to 1,388.53 and 2,982.66

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Solution

The third proportional to 1,388.53 and 2,982.66 is: 6,406.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.53 : 2,982.66 = 2,982.66 : x
  2. Step 2: Convert to fraction form
    1,388.53/2,982.66 = 2,982.66/x
  3. Step 3: Cross multiply
    1,388.53x = 2,982.66 × 2,982.66
  4. Step 4: Simplify right side
    1,388.53x = 8,896,238.31
  5. Step 5: Solve for x
    x = 8,896,238.31/1,388.53
  6. Step 6: Final answer
    x = 6,406.94

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.