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Finding the Third Proportional to 166.25 and 254.63

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Solution

The third proportional to 166.25 and 254.63 is: 389.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.25 : 254.63 = 254.63 : x
  2. Step 2: Convert to fraction form
    166.25/254.63 = 254.63/x
  3. Step 3: Cross multiply
    166.25x = 254.63 × 254.63
  4. Step 4: Simplify right side
    166.25x = 64,833.89
  5. Step 5: Solve for x
    x = 64,833.89/166.25
  6. Step 6: Final answer
    x = 389.98

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.