Finding the Fourth Proportional to 197.15, 272.19 and 135.09
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Solution
The fourth proportional to 197.15, 272.19 and 135.09 is: 186.51
Step by Step Solution
- Step 1: Write the proportion equation
197.15 : 272.19 = 135.09 : x - Step 2: Convert to fraction form
197.15/272.19 = 135.09/x - Step 3: Cross multiply
197.15x = 272.19 × 135.09 - Step 4: Simplify right side
197.15x = 36,770.15 - Step 5: Solve for x
x = 36,770.15/197.15 - Step 6: Final answer
x = 186.51
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.