Finding the Fourth Proportional to 378.36, 522.15 and 220.97
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Solution
The fourth proportional to 378.36, 522.15 and 220.97 is: 304.94
Step by Step Solution
- Step 1: Write the proportion equation
378.36 : 522.15 = 220.97 : x - Step 2: Convert to fraction form
378.36/522.15 = 220.97/x - Step 3: Cross multiply
378.36x = 522.15 × 220.97 - Step 4: Simplify right side
378.36x = 115,376.05 - Step 5: Solve for x
x = 115,376.05/378.36 - Step 6: Final answer
x = 304.94
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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.