Finding the Fourth Proportional to 207,639.40, 311,021.70 and 207,639.40
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Solution
The fourth proportional to 207,639.40, 311,021.70 and 207,639.40 is: 311,021.70
Step by Step Solution
- Step 1: Write the proportion equation
207,639.40 : 311,021.70 = 207,639.40 : x - Step 2: Convert to fraction form
207,639.40/311,021.70 = 207,639.40/x - Step 3: Cross multiply
207,639.40x = 311,021.70 × 207,639.40 - Step 4: Simplify right side
207,639.40x = 64,580,359,174.98 - Step 5: Solve for x
x = 64,580,359,174.98/207,639.40 - Step 6: Final answer
x = 311,021.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.