Finding the Fourth Proportional to 311,788.71, 430,272.41 and 189,245.70
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Solution
The fourth proportional to 311,788.71, 430,272.41 and 189,245.70 is: 261,161.48
Step by Step Solution
- Step 1: Write the proportion equation
311,788.71 : 430,272.41 = 189,245.70 : x - Step 2: Convert to fraction form
311,788.71/430,272.41 = 189,245.70/x - Step 3: Cross multiply
311,788.71x = 430,272.41 × 189,245.70 - Step 4: Simplify right side
311,788.71x = 81,427,202,474.91 - Step 5: Solve for x
x = 81,427,202,474.91/311,788.71 - Step 6: Final answer
x = 261,161.48
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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.