Finding the Fourth Proportional to 309.99, 427.38 and 236.18
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Solution
The fourth proportional to 309.99, 427.38 and 236.18 is: 325.62
Step by Step Solution
- Step 1: Write the proportion equation
309.99 : 427.38 = 236.18 : x - Step 2: Convert to fraction form
309.99/427.38 = 236.18/x - Step 3: Cross multiply
309.99x = 427.38 × 236.18 - Step 4: Simplify right side
309.99x = 100,938.79 - Step 5: Solve for x
x = 100,938.79/309.99 - Step 6: Final answer
x = 325.62
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.