Finding the Fourth Proportional to 221.26, 331.79 and 129.99
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Solution
The fourth proportional to 221.26, 331.79 and 129.99 is: 194.92
Step by Step Solution
- Step 1: Write the proportion equation
221.26 : 331.79 = 129.99 : x - Step 2: Convert to fraction form
221.26/331.79 = 129.99/x - Step 3: Cross multiply
221.26x = 331.79 × 129.99 - Step 4: Simplify right side
221.26x = 43,127.72 - Step 5: Solve for x
x = 43,127.72/221.26 - Step 6: Final answer
x = 194.92
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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.