Finding the Fourth Proportional to 678,316.62, 1,016,144.82 and 393,408.84
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Solution
The fourth proportional to 678,316.62, 1,016,144.82 and 393,408.84 is: 589,341.83
Step by Step Solution
- Step 1: Write the proportion equation
678,316.62 : 1,016,144.82 = 393,408.84 : x - Step 2: Convert to fraction form
678,316.62/1,016,144.82 = 393,408.84/x - Step 3: Cross multiply
678,316.62x = 1,016,144.82 × 393,408.84 - Step 4: Simplify right side
678,316.62x = 399,760,354,908.21 - Step 5: Solve for x
x = 399,760,354,908.21/678,316.62 - Step 6: Final answer
x = 589,341.83
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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.