Finding the Fourth Proportional to 686,662.14, 1,029,640.29 and 402,912.09
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Solution
The fourth proportional to 686,662.14, 1,029,640.29 and 402,912.09 is: 604,161.05
Step by Step Solution
- Step 1: Write the proportion equation
686,662.14 : 1,029,640.29 = 402,912.09 : x - Step 2: Convert to fraction form
686,662.14/1,029,640.29 = 402,912.09/x - Step 3: Cross multiply
686,662.14x = 1,029,640.29 × 402,912.09 - Step 4: Simplify right side
686,662.14x = 414,854,521,192.11 - Step 5: Solve for x
x = 414,854,521,192.11/686,662.14 - Step 6: Final answer
x = 604,161.05
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1.5x scale
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.