Finding the Fourth Proportional to 678,855.74, 936,688.34 and 388,556.09
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Solution
The fourth proportional to 678,855.74, 936,688.34 and 388,556.09 is: 536,131.52
Step by Step Solution
- Step 1: Write the proportion equation
678,855.74 : 936,688.34 = 388,556.09 : x - Step 2: Convert to fraction form
678,855.74/936,688.34 = 388,556.09/x - Step 3: Cross multiply
678,855.74x = 936,688.34 × 388,556.09 - Step 4: Simplify right side
678,855.74x = 363,955,958,193.11 - Step 5: Solve for x
x = 363,955,958,193.11/678,855.74 - Step 6: Final answer
x = 536,131.52
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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.