Finding the Fourth Proportional to 311.85, 430.26 and 201.13
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Solution
The fourth proportional to 311.85, 430.26 and 201.13 is: 277.49
Step by Step Solution
- Step 1: Write the proportion equation
311.85 : 430.26 = 201.13 : x - Step 2: Convert to fraction form
311.85/430.26 = 201.13/x - Step 3: Cross multiply
311.85x = 430.26 × 201.13 - Step 4: Simplify right side
311.85x = 86,536.36 - Step 5: Solve for x
x = 86,536.36/311.85 - Step 6: Final answer
x = 277.49
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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.