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Finding the Third Proportional to 1,686.50 and 2,447

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Solution

The third proportional to 1,686.50 and 2,447 is: 3,550.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.50 : 2,447 = 2,447 : x
  2. Step 2: Convert to fraction form
    1,686.50/2,447 = 2,447/x
  3. Step 3: Cross multiply
    1,686.50x = 2,447 × 2,447
  4. Step 4: Simplify right side
    1,686.50x = 5,987,809
  5. Step 5: Solve for x
    x = 5,987,809/1,686.50
  6. Step 6: Final answer
    x = 3,550.44

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.