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Finding the Third Proportional to 302.81 and 343.31

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Solution

The third proportional to 302.81 and 343.31 is: 389.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.81 : 343.31 = 343.31 : x
  2. Step 2: Convert to fraction form
    302.81/343.31 = 343.31/x
  3. Step 3: Cross multiply
    302.81x = 343.31 × 343.31
  4. Step 4: Simplify right side
    302.81x = 117,863.47
  5. Step 5: Solve for x
    x = 117,863.47/302.81
  6. Step 6: Final answer
    x = 389.23

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.