Finding the Fourth Proportional to 386.55, 580.14 and 170.28
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Solution
The fourth proportional to 386.55, 580.14 and 170.28 is: 255.56
Step by Step Solution
- Step 1: Write the proportion equation
386.55 : 580.14 = 170.28 : x - Step 2: Convert to fraction form
386.55/580.14 = 170.28/x - Step 3: Cross multiply
386.55x = 580.14 × 170.28 - Step 4: Simplify right side
386.55x = 98,786.24 - Step 5: Solve for x
x = 98,786.24/386.55 - Step 6: Final answer
x = 255.56
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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.