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Finding the Third Proportional to 275.75 and 491

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Solution

The third proportional to 275.75 and 491 is: 874.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.75 : 491 = 491 : x
  2. Step 2: Convert to fraction form
    275.75/491 = 491/x
  3. Step 3: Cross multiply
    275.75x = 491 × 491
  4. Step 4: Simplify right side
    275.75x = 241,081
  5. Step 5: Solve for x
    x = 241,081/275.75
  6. Step 6: Final answer
    x = 874.27

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.