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Finding the Third Proportional to 187.31 and 386.16

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Solution

The third proportional to 187.31 and 386.16 is: 796.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.31 : 386.16 = 386.16 : x
  2. Step 2: Convert to fraction form
    187.31/386.16 = 386.16/x
  3. Step 3: Cross multiply
    187.31x = 386.16 × 386.16
  4. Step 4: Simplify right side
    187.31x = 149,116.65
  5. Step 5: Solve for x
    x = 149,116.65/187.31
  6. Step 6: Final answer
    x = 796.08

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.