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Finding the Third Proportional to 271.75 and 648.88

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Solution

The third proportional to 271.75 and 648.88 is: 1,549.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.75 : 648.88 = 648.88 : x
  2. Step 2: Convert to fraction form
    271.75/648.88 = 648.88/x
  3. Step 3: Cross multiply
    271.75x = 648.88 × 648.88
  4. Step 4: Simplify right side
    271.75x = 421,038.77
  5. Step 5: Solve for x
    x = 421,038.77/271.75
  6. Step 6: Final answer
    x = 1,549.36

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.