Finding the Fourth Proportional to 389,279,912.45, 537,207,916.36 and 210,663,809.21
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Solution
The fourth proportional to 389,279,912.45, 537,207,916.36 and 210,663,809.21 is: 290,716,942.69
Step by Step Solution
- Step 1: Write the proportion equation
389,279,912.45 : 537,207,916.36 = 210,663,809.21 : x - Step 2: Convert to fraction form
389,279,912.45/537,207,916.36 = 210,663,809.21/x - Step 3: Cross multiply
389,279,912.45x = 537,207,916.36 × 210,663,809.21 - Step 4: Simplify right side
389,279,912.45x = 113,170,265,999,294,816 - Step 5: Solve for x
x = 113,170,265,999,294,816/389,279,912.45 - Step 6: Final answer
x = 290,716,942.69
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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.