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Finding the Third Proportional to 365 and 394.25

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Solution

The third proportional to 365 and 394.25 is: 425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    365 : 394.25 = 394.25 : x
  2. Step 2: Convert to fraction form
    365/394.25 = 394.25/x
  3. Step 3: Cross multiply
    365x = 394.25 × 394.25
  4. Step 4: Simplify right side
    365x = 155,433.06
  5. Step 5: Solve for x
    x = 155,433.06/365
  6. Step 6: Final answer
    x = 425.84

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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.