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Finding the Third Proportional to 291.50 and 350.50

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Solution

The third proportional to 291.50 and 350.50 is: 421.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.50 : 350.50 = 350.50 : x
  2. Step 2: Convert to fraction form
    291.50/350.50 = 350.50/x
  3. Step 3: Cross multiply
    291.50x = 350.50 × 350.50
  4. Step 4: Simplify right side
    291.50x = 122,850.25
  5. Step 5: Solve for x
    x = 122,850.25/291.50
  6. Step 6: Final answer
    x = 421.44

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.