Finding the Fourth Proportional to 388,136.36, 535,584.84 and 218,366.84
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Solution
The fourth proportional to 388,136.36, 535,584.84 and 218,366.84 is: 301,321.86
Step by Step Solution
- Step 1: Write the proportion equation
388,136.36 : 535,584.84 = 218,366.84 : x - Step 2: Convert to fraction form
388,136.36/535,584.84 = 218,366.84/x - Step 3: Cross multiply
388,136.36x = 535,584.84 × 218,366.84 - Step 4: Simplify right side
388,136.36x = 116,953,969,062.71 - Step 5: Solve for x
x = 116,953,969,062.71/388,136.36 - Step 6: Final answer
x = 301,321.86
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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.