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Finding the Third Proportional to 172 and 308

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Solution

The third proportional to 172 and 308 is: 551.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    172 : 308 = 308 : x
  2. Step 2: Convert to fraction form
    172/308 = 308/x
  3. Step 3: Cross multiply
    172x = 308 × 308
  4. Step 4: Simplify right side
    172x = 94,864
  5. Step 5: Solve for x
    x = 94,864/172
  6. Step 6: Final answer
    x = 551.53

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.