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Finding the Third Proportional to 91.31 and 197.63

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Solution

The third proportional to 91.31 and 197.63 is: 427.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.31 : 197.63 = 197.63 : x
  2. Step 2: Convert to fraction form
    91.31/197.63 = 197.63/x
  3. Step 3: Cross multiply
    91.31x = 197.63 × 197.63
  4. Step 4: Simplify right side
    91.31x = 39,055.64
  5. Step 5: Solve for x
    x = 39,055.64/91.31
  6. Step 6: Final answer
    x = 427.71

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.