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Finding the Third Proportional to 170.81 and 257.44

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Solution

The third proportional to 170.81 and 257.44 is: 387.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.81 : 257.44 = 257.44 : x
  2. Step 2: Convert to fraction form
    170.81/257.44 = 257.44/x
  3. Step 3: Cross multiply
    170.81x = 257.44 × 257.44
  4. Step 4: Simplify right side
    170.81x = 66,274.07
  5. Step 5: Solve for x
    x = 66,274.07/170.81
  6. Step 6: Final answer
    x = 387.99

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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.