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Finding the Third Proportional to 213.38 and 435.75

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Solution

The third proportional to 213.38 and 435.75 is: 889.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.38 : 435.75 = 435.75 : x
  2. Step 2: Convert to fraction form
    213.38/435.75 = 435.75/x
  3. Step 3: Cross multiply
    213.38x = 435.75 × 435.75
  4. Step 4: Simplify right side
    213.38x = 189,878.06
  5. Step 5: Solve for x
    x = 189,878.06/213.38
  6. Step 6: Final answer
    x = 889.88

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.