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Finding the Third Proportional to 79.75 and 178.50

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Solution

The third proportional to 79.75 and 178.50 is: 399.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.75 : 178.50 = 178.50 : x
  2. Step 2: Convert to fraction form
    79.75/178.50 = 178.50/x
  3. Step 3: Cross multiply
    79.75x = 178.50 × 178.50
  4. Step 4: Simplify right side
    79.75x = 31,862.25
  5. Step 5: Solve for x
    x = 31,862.25/79.75
  6. Step 6: Final answer
    x = 399.53

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Why These Related Problems?

These problems maintain the same ratio (2.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.