Finding the Fourth Proportional to 386.26, 532.99 and 220.43
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Solution
The fourth proportional to 386.26, 532.99 and 220.43 is: 304.17
Step by Step Solution
- Step 1: Write the proportion equation
386.26 : 532.99 = 220.43 : x - Step 2: Convert to fraction form
386.26/532.99 = 220.43/x - Step 3: Cross multiply
386.26x = 532.99 × 220.43 - Step 4: Simplify right side
386.26x = 117,486.99 - Step 5: Solve for x
x = 117,486.99/386.26 - Step 6: Final answer
x = 304.17
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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.