Finding the Fourth Proportional to 211.44, 317.18 and 81.44
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Solution
The fourth proportional to 211.44, 317.18 and 81.44 is: 122.17
Step by Step Solution
- Step 1: Write the proportion equation
211.44 : 317.18 = 81.44 : x - Step 2: Convert to fraction form
211.44/317.18 = 81.44/x - Step 3: Cross multiply
211.44x = 317.18 × 81.44 - Step 4: Simplify right side
211.44x = 25,831.14 - Step 5: Solve for x
x = 25,831.14/211.44 - Step 6: Final answer
x = 122.17
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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.