Finding the Fourth Proportional to 249.23, 343.93 and 138.70
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Solution
The fourth proportional to 249.23, 343.93 and 138.70 is: 191.41
Step by Step Solution
- Step 1: Write the proportion equation
249.23 : 343.93 = 138.70 : x - Step 2: Convert to fraction form
249.23/343.93 = 138.70/x - Step 3: Cross multiply
249.23x = 343.93 × 138.70 - Step 4: Simplify right side
249.23x = 47,703.09 - Step 5: Solve for x
x = 47,703.09/249.23 - Step 6: Final answer
x = 191.41
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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.