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Finding the Third Proportional to 279.38 and 605.81

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Solution

The third proportional to 279.38 and 605.81 is: 1,313.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.38 : 605.81 = 605.81 : x
  2. Step 2: Convert to fraction form
    279.38/605.81 = 605.81/x
  3. Step 3: Cross multiply
    279.38x = 605.81 × 605.81
  4. Step 4: Simplify right side
    279.38x = 367,008.79
  5. Step 5: Solve for x
    x = 367,008.79/279.38
  6. Step 6: Final answer
    x = 1,313.68

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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.