Finding the Fourth Proportional to 819,916.20, 1,230,104.70 and 399,205.80
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Solution
The fourth proportional to 819,916.20, 1,230,104.70 and 399,205.80 is: 598,920.88
Step by Step Solution
- Step 1: Write the proportion equation
819,916.20 : 1,230,104.70 = 399,205.80 : x - Step 2: Convert to fraction form
819,916.20/1,230,104.70 = 399,205.80/x - Step 3: Cross multiply
819,916.20x = 1,230,104.70 × 399,205.80 - Step 4: Simplify right side
819,916.20x = 491,064,930,847.26 - Step 5: Solve for x
x = 491,064,930,847.26/819,916.20 - Step 6: Final answer
x = 598,920.88
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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.