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Finding the Third Proportional to 346.78 and 371.46

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Solution

The third proportional to 346.78 and 371.46 is: 397.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.78 : 371.46 = 371.46 : x
  2. Step 2: Convert to fraction form
    346.78/371.46 = 371.46/x
  3. Step 3: Cross multiply
    346.78x = 371.46 × 371.46
  4. Step 4: Simplify right side
    346.78x = 137,983.23
  5. Step 5: Solve for x
    x = 137,983.23/346.78
  6. Step 6: Final answer
    x = 397.90

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Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.