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Finding the Third Proportional to 213.75 and 434.81

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Solution

The third proportional to 213.75 and 434.81 is: 884.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.75 : 434.81 = 434.81 : x
  2. Step 2: Convert to fraction form
    213.75/434.81 = 434.81/x
  3. Step 3: Cross multiply
    213.75x = 434.81 × 434.81
  4. Step 4: Simplify right side
    213.75x = 189,061.91
  5. Step 5: Solve for x
    x = 189,061.91/213.75
  6. Step 6: Final answer
    x = 884.50

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.