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Finding the Third Proportional to 98.72 and 174.66

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Solution

The third proportional to 98.72 and 174.66 is: 309.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.72 : 174.66 = 174.66 : x
  2. Step 2: Convert to fraction form
    98.72/174.66 = 174.66/x
  3. Step 3: Cross multiply
    98.72x = 174.66 × 174.66
  4. Step 4: Simplify right side
    98.72x = 30,504.81
  5. Step 5: Solve for x
    x = 30,504.81/98.72
  6. Step 6: Final answer
    x = 309.01

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.