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Finding the Third Proportional to 178.45 and 210.42

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Solution

The third proportional to 178.45 and 210.42 is: 248.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.45 : 210.42 = 210.42 : x
  2. Step 2: Convert to fraction form
    178.45/210.42 = 210.42/x
  3. Step 3: Cross multiply
    178.45x = 210.42 × 210.42
  4. Step 4: Simplify right side
    178.45x = 44,277.37
  5. Step 5: Solve for x
    x = 44,277.37/178.45
  6. Step 6: Final answer
    x = 248.12

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.