Finding the Fourth Proportional to 386.76, 580.02 and 254.99
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Solution
The fourth proportional to 386.76, 580.02 and 254.99 is: 382.40
Step by Step Solution
- Step 1: Write the proportion equation
386.76 : 580.02 = 254.99 : x - Step 2: Convert to fraction form
386.76/580.02 = 254.99/x - Step 3: Cross multiply
386.76x = 580.02 × 254.99 - Step 4: Simplify right side
386.76x = 147,896.40 - Step 5: Solve for x
x = 147,896.40/386.76 - Step 6: Final answer
x = 382.40
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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.