Finding the Fourth Proportional to 379.60, 523.84 and 239.68
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Solution
The fourth proportional to 379.60, 523.84 and 239.68 is: 330.75
Step by Step Solution
- Step 1: Write the proportion equation
379.60 : 523.84 = 239.68 : x - Step 2: Convert to fraction form
379.60/523.84 = 239.68/x - Step 3: Cross multiply
379.60x = 523.84 × 239.68 - Step 4: Simplify right side
379.60x = 125,553.97 - Step 5: Solve for x
x = 125,553.97/379.60 - Step 6: Final answer
x = 330.75
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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.