Finding the Fourth Proportional to 258.99, 388.74 and 122.13
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Solution
The fourth proportional to 258.99, 388.74 and 122.13 is: 183.32
Step by Step Solution
- Step 1: Write the proportion equation
258.99 : 388.74 = 122.13 : x - Step 2: Convert to fraction form
258.99/388.74 = 122.13/x - Step 3: Cross multiply
258.99x = 388.74 × 122.13 - Step 4: Simplify right side
258.99x = 47,476.82 - Step 5: Solve for x
x = 47,476.82/258.99 - Step 6: Final answer
x = 183.32
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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.