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Finding the Third Proportional to 172.31 and 253.41

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Solution

The third proportional to 172.31 and 253.41 is: 372.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.31 : 253.41 = 253.41 : x
  2. Step 2: Convert to fraction form
    172.31/253.41 = 253.41/x
  3. Step 3: Cross multiply
    172.31x = 253.41 × 253.41
  4. Step 4: Simplify right side
    172.31x = 64,214.73
  5. Step 5: Solve for x
    x = 64,214.73/172.31
  6. Step 6: Final answer
    x = 372.66

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.