Finding the Fourth Proportional to 427.36, 640.97 and 119.14
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Solution
The fourth proportional to 427.36, 640.97 and 119.14 is: 178.69
Step by Step Solution
- Step 1: Write the proportion equation
427.36 : 640.97 = 119.14 : x - Step 2: Convert to fraction form
427.36/640.97 = 119.14/x - Step 3: Cross multiply
427.36x = 640.97 × 119.14 - Step 4: Simplify right side
427.36x = 76,365.17 - Step 5: Solve for x
x = 76,365.17/427.36 - Step 6: Final answer
x = 178.69
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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.