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Finding the Third Proportional to 172.50 and 281

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Solution

The third proportional to 172.50 and 281 is: 457.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.50 : 281 = 281 : x
  2. Step 2: Convert to fraction form
    172.50/281 = 281/x
  3. Step 3: Cross multiply
    172.50x = 281 × 281
  4. Step 4: Simplify right side
    172.50x = 78,961
  5. Step 5: Solve for x
    x = 78,961/172.50
  6. Step 6: Final answer
    x = 457.74

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.