Finding the Fourth Proportional to 393,631.79, 543,263.96 and 221,583.07
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Solution
The fourth proportional to 393,631.79, 543,263.96 and 221,583.07 is: 305,813.95
Step by Step Solution
- Step 1: Write the proportion equation
393,631.79 : 543,263.96 = 221,583.07 : x - Step 2: Convert to fraction form
393,631.79/543,263.96 = 221,583.07/x - Step 3: Cross multiply
393,631.79x = 543,263.96 × 221,583.07 - Step 4: Simplify right side
393,631.79x = 120,378,093,611.08 - Step 5: Solve for x
x = 120,378,093,611.08/393,631.79 - Step 6: Final answer
x = 305,813.95
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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.