Finding the Fourth Proportional to 822,885.21, 1,135,809.84 and 478,787.60
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Solution
The fourth proportional to 822,885.21, 1,135,809.84 and 478,787.60 is: 660,859.69
Step by Step Solution
- Step 1: Write the proportion equation
822,885.21 : 1,135,809.84 = 478,787.60 : x - Step 2: Convert to fraction form
822,885.21/1,135,809.84 = 478,787.60/x - Step 3: Cross multiply
822,885.21x = 1,135,809.84 × 478,787.60 - Step 4: Simplify right side
822,885.21x = 543,811,661,670.94 - Step 5: Solve for x
x = 543,811,661,670.94/822,885.21 - Step 6: Final answer
x = 660,859.69
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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.