Finding the Fourth Proportional to 311.99, 430.35 and 195.62
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Solution
The fourth proportional to 311.99, 430.35 and 195.62 is: 269.83
Step by Step Solution
- Step 1: Write the proportion equation
311.99 : 430.35 = 195.62 : x - Step 2: Convert to fraction form
311.99/430.35 = 195.62/x - Step 3: Cross multiply
311.99x = 430.35 × 195.62 - Step 4: Simplify right side
311.99x = 84,185.07 - Step 5: Solve for x
x = 84,185.07/311.99 - Step 6: Final answer
x = 269.83
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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.