Finding the Fourth Proportional to 281.09, 421.26 and 126.99
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Solution
The fourth proportional to 281.09, 421.26 and 126.99 is: 190.32
Step by Step Solution
- Step 1: Write the proportion equation
281.09 : 421.26 = 126.99 : x - Step 2: Convert to fraction form
281.09/421.26 = 126.99/x - Step 3: Cross multiply
281.09x = 421.26 × 126.99 - Step 4: Simplify right side
281.09x = 53,495.81 - Step 5: Solve for x
x = 53,495.81/281.09 - Step 6: Final answer
x = 190.32
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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.