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Finding the Third Proportional to 148.78 and 230.34

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Solution

The third proportional to 148.78 and 230.34 is: 356.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.78 : 230.34 = 230.34 : x
  2. Step 2: Convert to fraction form
    148.78/230.34 = 230.34/x
  3. Step 3: Cross multiply
    148.78x = 230.34 × 230.34
  4. Step 4: Simplify right side
    148.78x = 53,058.24
  5. Step 5: Solve for x
    x = 53,058.24/148.78
  6. Step 6: Final answer
    x = 356.62

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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.