Finding the Fourth Proportional to 196.70, 271.39 and 113.79
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Solution
The fourth proportional to 196.70, 271.39 and 113.79 is: 156.99
Step by Step Solution
- Step 1: Write the proportion equation
196.70 : 271.39 = 113.79 : x - Step 2: Convert to fraction form
196.70/271.39 = 113.79/x - Step 3: Cross multiply
196.70x = 271.39 × 113.79 - Step 4: Simplify right side
196.70x = 30,880.17 - Step 5: Solve for x
x = 30,880.17/196.70 - Step 6: Final answer
x = 156.99
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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.