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Finding the Third Proportional to 180.91 and 258.47

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Solution

The third proportional to 180.91 and 258.47 is: 369.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.91 : 258.47 = 258.47 : x
  2. Step 2: Convert to fraction form
    180.91/258.47 = 258.47/x
  3. Step 3: Cross multiply
    180.91x = 258.47 × 258.47
  4. Step 4: Simplify right side
    180.91x = 66,806.09
  5. Step 5: Solve for x
    x = 66,806.09/180.91
  6. Step 6: Final answer
    x = 369.27

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.