Finding the Fourth Proportional to 386.99, 580.21 and 181.44
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Solution
The fourth proportional to 386.99, 580.21 and 181.44 is: 272.03
Step by Step Solution
- Step 1: Write the proportion equation
386.99 : 580.21 = 181.44 : x - Step 2: Convert to fraction form
386.99/580.21 = 181.44/x - Step 3: Cross multiply
386.99x = 580.21 × 181.44 - Step 4: Simplify right side
386.99x = 105,273.30 - Step 5: Solve for x
x = 105,273.30/386.99 - Step 6: Final answer
x = 272.03
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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.