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Finding the Third Proportional to 117.38 and 257.25

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Solution

The third proportional to 117.38 and 257.25 is: 563.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.38 : 257.25 = 257.25 : x
  2. Step 2: Convert to fraction form
    117.38/257.25 = 257.25/x
  3. Step 3: Cross multiply
    117.38x = 257.25 × 257.25
  4. Step 4: Simplify right side
    117.38x = 66,177.56
  5. Step 5: Solve for x
    x = 66,177.56/117.38
  6. Step 6: Final answer
    x = 563.81

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.