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Finding the Third Proportional to 266.50 and 426.25

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Solution

The third proportional to 266.50 and 426.25 is: 681.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.50 : 426.25 = 426.25 : x
  2. Step 2: Convert to fraction form
    266.50/426.25 = 426.25/x
  3. Step 3: Cross multiply
    266.50x = 426.25 × 426.25
  4. Step 4: Simplify right side
    266.50x = 181,689.06
  5. Step 5: Solve for x
    x = 181,689.06/266.50
  6. Step 6: Final answer
    x = 681.76

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.