Finding the Fourth Proportional to 231.18, 318.97 and 161.31
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Solution
The fourth proportional to 231.18, 318.97 and 161.31 is: 222.57
Step by Step Solution
- Step 1: Write the proportion equation
231.18 : 318.97 = 161.31 : x - Step 2: Convert to fraction form
231.18/318.97 = 161.31/x - Step 3: Cross multiply
231.18x = 318.97 × 161.31 - Step 4: Simplify right side
231.18x = 51,453.05 - Step 5: Solve for x
x = 51,453.05/231.18 - Step 6: Final answer
x = 222.57
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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.