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Finding the Third Proportional to 122.81 and 266.25

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Solution

The third proportional to 122.81 and 266.25 is: 577.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.81 : 266.25 = 266.25 : x
  2. Step 2: Convert to fraction form
    122.81/266.25 = 266.25/x
  3. Step 3: Cross multiply
    122.81x = 266.25 × 266.25
  4. Step 4: Simplify right side
    122.81x = 70,889.06
  5. Step 5: Solve for x
    x = 70,889.06/122.81
  6. Step 6: Final answer
    x = 577.21

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.