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Finding the Third Proportional to 261.75 and 359.38

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Solution

The third proportional to 261.75 and 359.38 is: 493.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.75 : 359.38 = 359.38 : x
  2. Step 2: Convert to fraction form
    261.75/359.38 = 359.38/x
  3. Step 3: Cross multiply
    261.75x = 359.38 × 359.38
  4. Step 4: Simplify right side
    261.75x = 129,150.39
  5. Step 5: Solve for x
    x = 129,150.39/261.75
  6. Step 6: Final answer
    x = 493.41

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.