Finding the Fourth Proportional to 311.84, 430.26 and 201.18
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Solution
The fourth proportional to 311.84, 430.26 and 201.18 is: 277.58
Step by Step Solution
- Step 1: Write the proportion equation
311.84 : 430.26 = 201.18 : x - Step 2: Convert to fraction form
311.84/430.26 = 201.18/x - Step 3: Cross multiply
311.84x = 430.26 × 201.18 - Step 4: Simplify right side
311.84x = 86,559.71 - Step 5: Solve for x
x = 86,559.71/311.84 - Step 6: Final answer
x = 277.58
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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.