Finding the Fourth Proportional to 678,592.21, 936,532.11 and 388,230.70
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Solution
The fourth proportional to 678,592.21, 936,532.11 and 388,230.70 is: 535,801.19
Step by Step Solution
- Step 1: Write the proportion equation
678,592.21 : 936,532.11 = 388,230.70 : x - Step 2: Convert to fraction form
678,592.21/936,532.11 = 388,230.70/x - Step 3: Cross multiply
678,592.21x = 936,532.11 × 388,230.70 - Step 4: Simplify right side
678,592.21x = 363,590,516,637.78 - Step 5: Solve for x
x = 363,590,516,637.78/678,592.21 - Step 6: Final answer
x = 535,801.19
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1.5x scale
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.