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Finding the Third Proportional to 764.44 and 1,686.66

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Solution

The third proportional to 764.44 and 1,686.66 is: 3,721.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.44 : 1,686.66 = 1,686.66 : x
  2. Step 2: Convert to fraction form
    764.44/1,686.66 = 1,686.66/x
  3. Step 3: Cross multiply
    764.44x = 1,686.66 × 1,686.66
  4. Step 4: Simplify right side
    764.44x = 2,844,809.31
  5. Step 5: Solve for x
    x = 2,844,809.31/764.44
  6. Step 6: Final answer
    x = 3,721.44

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.