Finding the Fourth Proportional to 163.20, 220.80 and 163.20
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Solution
The fourth proportional to 163.20, 220.80 and 163.20 is: 220.80
Step by Step Solution
- Step 1: Write the proportion equation
163.20 : 220.80 = 163.20 : x - Step 2: Convert to fraction form
163.20/220.80 = 163.20/x - Step 3: Cross multiply
163.20x = 220.80 × 163.20 - Step 4: Simplify right side
163.20x = 36,034.56 - Step 5: Solve for x
x = 36,034.56/163.20 - Step 6: Final answer
x = 220.80
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Why These Related Problems?
These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.