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Finding the Third Proportional to 217.75 and 459.75

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Solution

The third proportional to 217.75 and 459.75 is: 970.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.75 : 459.75 = 459.75 : x
  2. Step 2: Convert to fraction form
    217.75/459.75 = 459.75/x
  3. Step 3: Cross multiply
    217.75x = 459.75 × 459.75
  4. Step 4: Simplify right side
    217.75x = 211,370.06
  5. Step 5: Solve for x
    x = 211,370.06/217.75
  6. Step 6: Final answer
    x = 970.70

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.