Finding the Fourth Proportional to 145.19, 217.79 and 84.44
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Solution
The fourth proportional to 145.19, 217.79 and 84.44 is: 126.66
Step by Step Solution
- Step 1: Write the proportion equation
145.19 : 217.79 = 84.44 : x - Step 2: Convert to fraction form
145.19/217.79 = 84.44/x - Step 3: Cross multiply
145.19x = 217.79 × 84.44 - Step 4: Simplify right side
145.19x = 18,390.63 - Step 5: Solve for x
x = 18,390.63/145.19 - Step 6: Final answer
x = 126.66
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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.