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Finding the Third Proportional to 156.38 and 248.25

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Solution

The third proportional to 156.38 and 248.25 is: 394.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.38 : 248.25 = 248.25 : x
  2. Step 2: Convert to fraction form
    156.38/248.25 = 248.25/x
  3. Step 3: Cross multiply
    156.38x = 248.25 × 248.25
  4. Step 4: Simplify right side
    156.38x = 61,628.06
  5. Step 5: Solve for x
    x = 61,628.06/156.38
  6. Step 6: Final answer
    x = 394.10

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.