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Finding the Third Proportional to 310.92 and 348.05

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Solution

The third proportional to 310.92 and 348.05 is: 389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.92 : 348.05 = 348.05 : x
  2. Step 2: Convert to fraction form
    310.92/348.05 = 348.05/x
  3. Step 3: Cross multiply
    310.92x = 348.05 × 348.05
  4. Step 4: Simplify right side
    310.92x = 121,136.63
  5. Step 5: Solve for x
    x = 121,136.63/310.92
  6. Step 6: Final answer
    x = 389.60

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.