Finding the Fourth Proportional to 197.80, 272.69 and 135.53
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Solution
The fourth proportional to 197.80, 272.69 and 135.53 is: 186.85
Step by Step Solution
- Step 1: Write the proportion equation
197.80 : 272.69 = 135.53 : x - Step 2: Convert to fraction form
197.80/272.69 = 135.53/x - Step 3: Cross multiply
197.80x = 272.69 × 135.53 - Step 4: Simplify right side
197.80x = 36,958.70 - Step 5: Solve for x
x = 36,958.70/197.80 - Step 6: Final answer
x = 186.85
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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.