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Finding the Third Proportional to 90.94 and 197.63

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Solution

The third proportional to 90.94 and 197.63 is: 429.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.94 : 197.63 = 197.63 : x
  2. Step 2: Convert to fraction form
    90.94/197.63 = 197.63/x
  3. Step 3: Cross multiply
    90.94x = 197.63 × 197.63
  4. Step 4: Simplify right side
    90.94x = 39,055.64
  5. Step 5: Solve for x
    x = 39,055.64/90.94
  6. Step 6: Final answer
    x = 429.48

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.