Finding the Fourth Proportional to 311,729.21, 430,186.24 and 168,489.21
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Solution
The fourth proportional to 311,729.21, 430,186.24 and 168,489.21 is: 232,515.08
Step by Step Solution
- Step 1: Write the proportion equation
311,729.21 : 430,186.24 = 168,489.21 : x - Step 2: Convert to fraction form
311,729.21/430,186.24 = 168,489.21/x - Step 3: Cross multiply
311,729.21x = 430,186.24 × 168,489.21 - Step 4: Simplify right side
311,729.21x = 72,481,741,554.28 - Step 5: Solve for x
x = 72,481,741,554.28/311,729.21 - Step 6: Final answer
x = 232,515.08
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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.