Finding the Fourth Proportional to 163.28, 243.88 and 129.08
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Solution
The fourth proportional to 163.28, 243.88 and 129.08 is: 192.80
Step by Step Solution
- Step 1: Write the proportion equation
163.28 : 243.88 = 129.08 : x - Step 2: Convert to fraction form
163.28/243.88 = 129.08/x - Step 3: Cross multiply
163.28x = 243.88 × 129.08 - Step 4: Simplify right side
163.28x = 31,480.03 - Step 5: Solve for x
x = 31,480.03/163.28 - Step 6: Final answer
x = 192.80
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.