Finding the Fourth Proportional to 386.75, 533.70 and 220.99
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Solution
The fourth proportional to 386.75, 533.70 and 220.99 is: 304.96
Step by Step Solution
- Step 1: Write the proportion equation
386.75 : 533.70 = 220.99 : x - Step 2: Convert to fraction form
386.75/533.70 = 220.99/x - Step 3: Cross multiply
386.75x = 533.70 × 220.99 - Step 4: Simplify right side
386.75x = 117,942.36 - Step 5: Solve for x
x = 117,942.36/386.75 - Step 6: Final answer
x = 304.96
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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.