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Finding the Third Proportional to 156.25 and 339.25

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Solution

The third proportional to 156.25 and 339.25 is: 736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.25 : 339.25 = 339.25 : x
  2. Step 2: Convert to fraction form
    156.25/339.25 = 339.25/x
  3. Step 3: Cross multiply
    156.25x = 339.25 × 339.25
  4. Step 4: Simplify right side
    156.25x = 115,090.56
  5. Step 5: Solve for x
    x = 115,090.56/156.25
  6. Step 6: Final answer
    x = 736.58

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.