Finding the Fourth Proportional to 211.26, 316.86 and 102.99
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Solution
The fourth proportional to 211.26, 316.86 and 102.99 is: 154.47
Step by Step Solution
- Step 1: Write the proportion equation
211.26 : 316.86 = 102.99 : x - Step 2: Convert to fraction form
211.26/316.86 = 102.99/x - Step 3: Cross multiply
211.26x = 316.86 × 102.99 - Step 4: Simplify right side
211.26x = 32,633.41 - Step 5: Solve for x
x = 32,633.41/211.26 - Step 6: Final answer
x = 154.47
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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.