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Finding the Third Proportional to 355.13 and 419.25

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Solution

The third proportional to 355.13 and 419.25 is: 494.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.13 : 419.25 = 419.25 : x
  2. Step 2: Convert to fraction form
    355.13/419.25 = 419.25/x
  3. Step 3: Cross multiply
    355.13x = 419.25 × 419.25
  4. Step 4: Simplify right side
    355.13x = 175,770.56
  5. Step 5: Solve for x
    x = 175,770.56/355.13
  6. Step 6: Final answer
    x = 494.95

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.