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Finding the Third Proportional to 319.65 and 495.25

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Solution

The third proportional to 319.65 and 495.25 is: 767.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.65 : 495.25 = 495.25 : x
  2. Step 2: Convert to fraction form
    319.65/495.25 = 495.25/x
  3. Step 3: Cross multiply
    319.65x = 495.25 × 495.25
  4. Step 4: Simplify right side
    319.65x = 245,277.40
  5. Step 5: Solve for x
    x = 245,277.40/319.65
  6. Step 6: Final answer
    x = 767.33

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.