Finding the Fourth Proportional to 310.70, 428.57 and 236.99
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Solution
The fourth proportional to 310.70, 428.57 and 236.99 is: 326.90
Step by Step Solution
- Step 1: Write the proportion equation
310.70 : 428.57 = 236.99 : x - Step 2: Convert to fraction form
310.70/428.57 = 236.99/x - Step 3: Cross multiply
310.70x = 428.57 × 236.99 - Step 4: Simplify right side
310.70x = 101,566.80 - Step 5: Solve for x
x = 101,566.80/310.70 - Step 6: Final answer
x = 326.90
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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.