Finding the Fourth Proportional to 207,631.80, 311,447.70 and 155,143.80
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Solution
The fourth proportional to 207,631.80, 311,447.70 and 155,143.80 is: 232,715.70
Step by Step Solution
- Step 1: Write the proportion equation
207,631.80 : 311,447.70 = 155,143.80 : x - Step 2: Convert to fraction form
207,631.80/311,447.70 = 155,143.80/x - Step 3: Cross multiply
207,631.80x = 311,447.70 × 155,143.80 - Step 4: Simplify right side
207,631.80x = 48,319,179,679.26 - Step 5: Solve for x
x = 48,319,179,679.26/207,631.80 - Step 6: Final answer
x = 232,715.70
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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.