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Finding the Third Proportional to 171.28 and 259.03

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Solution

The third proportional to 171.28 and 259.03 is: 391.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.28 : 259.03 = 259.03 : x
  2. Step 2: Convert to fraction form
    171.28/259.03 = 259.03/x
  3. Step 3: Cross multiply
    171.28x = 259.03 × 259.03
  4. Step 4: Simplify right side
    171.28x = 67,097.19
  5. Step 5: Solve for x
    x = 67,097.19/171.28
  6. Step 6: Final answer
    x = 391.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.