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Finding the Third Proportional to 198.39 and 430.95

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Solution

The third proportional to 198.39 and 430.95 is: 936.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.39 : 430.95 = 430.95 : x
  2. Step 2: Convert to fraction form
    198.39/430.95 = 430.95/x
  3. Step 3: Cross multiply
    198.39x = 430.95 × 430.95
  4. Step 4: Simplify right side
    198.39x = 185,713.86
  5. Step 5: Solve for x
    x = 185,713.86/198.39
  6. Step 6: Final answer
    x = 936.12

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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.