Finding the Fourth Proportional to 163.77, 226.28 and 128.88
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Solution
The fourth proportional to 163.77, 226.28 and 128.88 is: 178.07
Step by Step Solution
- Step 1: Write the proportion equation
163.77 : 226.28 = 128.88 : x - Step 2: Convert to fraction form
163.77/226.28 = 128.88/x - Step 3: Cross multiply
163.77x = 226.28 × 128.88 - Step 4: Simplify right side
163.77x = 29,161.84 - Step 5: Solve for x
x = 29,161.84/163.77 - Step 6: Final answer
x = 178.07
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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.