Finding the Fourth Proportional to 213.62, 320.18 and 126.99
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Solution
The fourth proportional to 213.62, 320.18 and 126.99 is: 190.34
Step by Step Solution
- Step 1: Write the proportion equation
213.62 : 320.18 = 126.99 : x - Step 2: Convert to fraction form
213.62/320.18 = 126.99/x - Step 3: Cross multiply
213.62x = 320.18 × 126.99 - Step 4: Simplify right side
213.62x = 40,659.02 - Step 5: Solve for x
x = 40,659.02/213.62 - Step 6: Final answer
x = 190.34
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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.