Finding the Fourth Proportional to 393,136.74, 542,512.62 and 221,049.81
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Solution
The fourth proportional to 393,136.74, 542,512.62 and 221,049.81 is: 305,039.70
Step by Step Solution
- Step 1: Write the proportion equation
393,136.74 : 542,512.62 = 221,049.81 : x - Step 2: Convert to fraction form
393,136.74/542,512.62 = 221,049.81/x - Step 3: Cross multiply
393,136.74x = 542,512.62 × 221,049.81 - Step 4: Simplify right side
393,136.74x = 119,922,311,573.60 - Step 5: Solve for x
x = 119,922,311,573.60/393,136.74 - Step 6: Final answer
x = 305,039.70
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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.