Finding the Fourth Proportional to 252.75, 379.25 and 138.75
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Solution
The fourth proportional to 252.75, 379.25 and 138.75 is: 208.19
Step by Step Solution
- Step 1: Write the proportion equation
252.75 : 379.25 = 138.75 : x - Step 2: Convert to fraction form
252.75/379.25 = 138.75/x - Step 3: Cross multiply
252.75x = 379.25 × 138.75 - Step 4: Simplify right side
252.75x = 52,620.24 - Step 5: Solve for x
x = 52,620.24/252.75 - Step 6: Final answer
x = 208.19
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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.