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Finding the Third Proportional to 138.63 and 293.31

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Solution

The third proportional to 138.63 and 293.31 is: 620.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.63 : 293.31 = 293.31 : x
  2. Step 2: Convert to fraction form
    138.63/293.31 = 293.31/x
  3. Step 3: Cross multiply
    138.63x = 293.31 × 293.31
  4. Step 4: Simplify right side
    138.63x = 86,032.22
  5. Step 5: Solve for x
    x = 86,032.22/138.63
  6. Step 6: Final answer
    x = 620.61

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.