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Finding the Third Proportional to 655 and 1,771.50

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Solution

The third proportional to 655 and 1,771.50 is: 4,791.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    655 : 1,771.50 = 1,771.50 : x
  2. Step 2: Convert to fraction form
    655/1,771.50 = 1,771.50/x
  3. Step 3: Cross multiply
    655x = 1,771.50 × 1,771.50
  4. Step 4: Simplify right side
    655x = 3,138,212.25
  5. Step 5: Solve for x
    x = 3,138,212.25/655
  6. Step 6: Final answer
    x = 4,791.16

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.