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Finding the Third Proportional to 66.75 and 146.25

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Solution

The third proportional to 66.75 and 146.25 is: 320.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.75 : 146.25 = 146.25 : x
  2. Step 2: Convert to fraction form
    66.75/146.25 = 146.25/x
  3. Step 3: Cross multiply
    66.75x = 146.25 × 146.25
  4. Step 4: Simplify right side
    66.75x = 21,389.06
  5. Step 5: Solve for x
    x = 21,389.06/66.75
  6. Step 6: Final answer
    x = 320.44

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.