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Finding the Third Proportional to 290.81 and 450.84

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Solution

The third proportional to 290.81 and 450.84 is: 698.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.81 : 450.84 = 450.84 : x
  2. Step 2: Convert to fraction form
    290.81/450.84 = 450.84/x
  3. Step 3: Cross multiply
    290.81x = 450.84 × 450.84
  4. Step 4: Simplify right side
    290.81x = 203,260.09
  5. Step 5: Solve for x
    x = 203,260.09/290.81
  6. Step 6: Final answer
    x = 698.94

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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.