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Finding the Third Proportional to 121 and 254

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Solution

The third proportional to 121 and 254 is: 533.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121 : 254 = 254 : x
  2. Step 2: Convert to fraction form
    121/254 = 254/x
  3. Step 3: Cross multiply
    121x = 254 × 254
  4. Step 4: Simplify right side
    121x = 64,516
  5. Step 5: Solve for x
    x = 64,516/121
  6. Step 6: Final answer
    x = 533.19

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.