Finding the Fourth Proportional to 221.26, 331.70 and 113.18
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Solution
The fourth proportional to 221.26, 331.70 and 113.18 is: 169.67
Step by Step Solution
- Step 1: Write the proportion equation
221.26 : 331.70 = 113.18 : x - Step 2: Convert to fraction form
221.26/331.70 = 113.18/x - Step 3: Cross multiply
221.26x = 331.70 × 113.18 - Step 4: Simplify right side
221.26x = 37,541.81 - Step 5: Solve for x
x = 37,541.81/221.26 - Step 6: Final answer
x = 169.67
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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.