Finding the Fourth Proportional to 187.11, 281.07 and 129.74
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Solution
The fourth proportional to 187.11, 281.07 and 129.74 is: 194.88
Step by Step Solution
- Step 1: Write the proportion equation
187.11 : 281.07 = 129.74 : x - Step 2: Convert to fraction form
187.11/281.07 = 129.74/x - Step 3: Cross multiply
187.11x = 281.07 × 129.74 - Step 4: Simplify right side
187.11x = 36,464.62 - Step 5: Solve for x
x = 36,464.62/187.11 - Step 6: Final answer
x = 194.88
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.