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Finding the Third Proportional to 168.72 and 345.99

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Solution

The third proportional to 168.72 and 345.99 is: 709.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.72 : 345.99 = 345.99 : x
  2. Step 2: Convert to fraction form
    168.72/345.99 = 345.99/x
  3. Step 3: Cross multiply
    168.72x = 345.99 × 345.99
  4. Step 4: Simplify right side
    168.72x = 119,709.24
  5. Step 5: Solve for x
    x = 119,709.24/168.72
  6. Step 6: Final answer
    x = 709.50

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.