Finding the Fourth Proportional to 212.92, 319.58 and 163.70
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Solution
The fourth proportional to 212.92, 319.58 and 163.70 is: 245.70
Step by Step Solution
- Step 1: Write the proportion equation
212.92 : 319.58 = 163.70 : x - Step 2: Convert to fraction form
212.92/319.58 = 163.70/x - Step 3: Cross multiply
212.92x = 319.58 × 163.70 - Step 4: Simplify right side
212.92x = 52,315.25 - Step 5: Solve for x
x = 52,315.25/212.92 - Step 6: Final answer
x = 245.70
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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.