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Finding the Third Proportional to 275.13 and 426.63

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Solution

The third proportional to 275.13 and 426.63 is: 661.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.13 : 426.63 = 426.63 : x
  2. Step 2: Convert to fraction form
    275.13/426.63 = 426.63/x
  3. Step 3: Cross multiply
    275.13x = 426.63 × 426.63
  4. Step 4: Simplify right side
    275.13x = 182,008.89
  5. Step 5: Solve for x
    x = 182,008.89/275.13
  6. Step 6: Final answer
    x = 661.55

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.