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Finding the Third Proportional to 266.63 and 422.63

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Solution

The third proportional to 266.63 and 422.63 is: 669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.63 : 422.63 = 422.63 : x
  2. Step 2: Convert to fraction form
    266.63/422.63 = 422.63/x
  3. Step 3: Cross multiply
    266.63x = 422.63 × 422.63
  4. Step 4: Simplify right side
    266.63x = 178,611.89
  5. Step 5: Solve for x
    x = 178,611.89/266.63
  6. Step 6: Final answer
    x = 669.90

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.