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Finding the Third Proportional to 213.75 and 458.86

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Solution

The third proportional to 213.75 and 458.86 is: 985.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.75 : 458.86 = 458.86 : x
  2. Step 2: Convert to fraction form
    213.75/458.86 = 458.86/x
  3. Step 3: Cross multiply
    213.75x = 458.86 × 458.86
  4. Step 4: Simplify right side
    213.75x = 210,551.93
  5. Step 5: Solve for x
    x = 210,551.93/213.75
  6. Step 6: Final answer
    x = 985.04

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.