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Finding the Third Proportional to 172.13 and 248.63

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Solution

The third proportional to 172.13 and 248.63 is: 359.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.13 : 248.63 = 248.63 : x
  2. Step 2: Convert to fraction form
    172.13/248.63 = 248.63/x
  3. Step 3: Cross multiply
    172.13x = 248.63 × 248.63
  4. Step 4: Simplify right side
    172.13x = 61,814.39
  5. Step 5: Solve for x
    x = 61,814.39/172.13
  6. Step 6: Final answer
    x = 359.13

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.