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Finding the Third Proportional to 178 and 274.25

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Solution

The third proportional to 178 and 274.25 is: 422.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    178 : 274.25 = 274.25 : x
  2. Step 2: Convert to fraction form
    178/274.25 = 274.25/x
  3. Step 3: Cross multiply
    178x = 274.25 × 274.25
  4. Step 4: Simplify right side
    178x = 75,213.06
  5. Step 5: Solve for x
    x = 75,213.06/178
  6. Step 6: Final answer
    x = 422.55

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.