Finding the Fourth Proportional to 187.71, 281.57 and 84.99
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Solution
The fourth proportional to 187.71, 281.57 and 84.99 is: 127.49
Step by Step Solution
- Step 1: Write the proportion equation
187.71 : 281.57 = 84.99 : x - Step 2: Convert to fraction form
187.71/281.57 = 84.99/x - Step 3: Cross multiply
187.71x = 281.57 × 84.99 - Step 4: Simplify right side
187.71x = 23,930.21 - Step 5: Solve for x
x = 23,930.21/187.71 - Step 6: Final answer
x = 127.49
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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.