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Finding the Third Proportional to 338.91 and 365.06

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Solution

The third proportional to 338.91 and 365.06 is: 393.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.91 : 365.06 = 365.06 : x
  2. Step 2: Convert to fraction form
    338.91/365.06 = 365.06/x
  3. Step 3: Cross multiply
    338.91x = 365.06 × 365.06
  4. Step 4: Simplify right side
    338.91x = 133,270.63
  5. Step 5: Solve for x
    x = 133,270.63/338.91
  6. Step 6: Final answer
    x = 393.24

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.