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Finding the Third Proportional to 189.75 and 290.25

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Solution

The third proportional to 189.75 and 290.25 is: 443.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.75 : 290.25 = 290.25 : x
  2. Step 2: Convert to fraction form
    189.75/290.25 = 290.25/x
  3. Step 3: Cross multiply
    189.75x = 290.25 × 290.25
  4. Step 4: Simplify right side
    189.75x = 84,245.06
  5. Step 5: Solve for x
    x = 84,245.06/189.75
  6. Step 6: Final answer
    x = 443.98

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.