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Finding the Third Proportional to 213.75 and 300

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Solution

The third proportional to 213.75 and 300 is: 421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.75 : 300 = 300 : x
  2. Step 2: Convert to fraction form
    213.75/300 = 300/x
  3. Step 3: Cross multiply
    213.75x = 300 × 300
  4. Step 4: Simplify right side
    213.75x = 90,000
  5. Step 5: Solve for x
    x = 90,000/213.75
  6. Step 6: Final answer
    x = 421.05

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These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.