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Finding the Third Proportional to 222.75 and 520.25

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Solution

The third proportional to 222.75 and 520.25 is: 1,215.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.75 : 520.25 = 520.25 : x
  2. Step 2: Convert to fraction form
    222.75/520.25 = 520.25/x
  3. Step 3: Cross multiply
    222.75x = 520.25 × 520.25
  4. Step 4: Simplify right side
    222.75x = 270,660.06
  5. Step 5: Solve for x
    x = 270,660.06/222.75
  6. Step 6: Final answer
    x = 1,215.08

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.