Finding the Fourth Proportional to 386.87, 580.09 and 170.19
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Solution
The fourth proportional to 386.87, 580.09 and 170.19 is: 255.19
Step by Step Solution
- Step 1: Write the proportion equation
386.87 : 580.09 = 170.19 : x - Step 2: Convert to fraction form
386.87/580.09 = 170.19/x - Step 3: Cross multiply
386.87x = 580.09 × 170.19 - Step 4: Simplify right side
386.87x = 98,725.52 - Step 5: Solve for x
x = 98,725.52/386.87 - Step 6: Final answer
x = 255.19
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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.