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Finding the Third Proportional to 200.16 and 378.09

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Solution

The third proportional to 200.16 and 378.09 is: 714.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.16 : 378.09 = 378.09 : x
  2. Step 2: Convert to fraction form
    200.16/378.09 = 378.09/x
  3. Step 3: Cross multiply
    200.16x = 378.09 × 378.09
  4. Step 4: Simplify right side
    200.16x = 142,954.88
  5. Step 5: Solve for x
    x = 142,954.88/200.16
  6. Step 6: Final answer
    x = 714.22

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Why These Related Problems?

These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.