Finding the Fourth Proportional to 235.70, 353.79 and 163.70
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Solution
The fourth proportional to 235.70, 353.79 and 163.70 is: 245.72
Step by Step Solution
- Step 1: Write the proportion equation
235.70 : 353.79 = 163.70 : x - Step 2: Convert to fraction form
235.70/353.79 = 163.70/x - Step 3: Cross multiply
235.70x = 353.79 × 163.70 - Step 4: Simplify right side
235.70x = 57,915.42 - Step 5: Solve for x
x = 57,915.42/235.70 - Step 6: Final answer
x = 245.72
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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.