Finding the Fourth Proportional to 311,880.07, 430,394.75 and 168,640.21
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Solution
The fourth proportional to 311,880.07, 430,394.75 and 168,640.21 is: 232,723.63
Step by Step Solution
- Step 1: Write the proportion equation
311,880.07 : 430,394.75 = 168,640.21 : x - Step 2: Convert to fraction form
311,880.07/430,394.75 = 168,640.21/x - Step 3: Cross multiply
311,880.07x = 430,394.75 × 168,640.21 - Step 4: Simplify right side
311,880.07x = 72,581,861,022.90 - Step 5: Solve for x
x = 72,581,861,022.90/311,880.07 - Step 6: Final answer
x = 232,723.63
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1.5x scale
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.