Finding the Fourth Proportional to 987,420.20, 1,361,703.84 and 681,006.92
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Solution
The fourth proportional to 987,420.20, 1,361,703.84 and 681,006.92 is: 939,143.98
Step by Step Solution
- Step 1: Write the proportion equation
987,420.20 : 1,361,703.84 = 681,006.92 : x - Step 2: Convert to fraction form
987,420.20/1,361,703.84 = 681,006.92/x - Step 3: Cross multiply
987,420.20x = 1,361,703.84 × 681,006.92 - Step 4: Simplify right side
987,420.20x = 927,329,738,030.57 - Step 5: Solve for x
x = 927,329,738,030.57/987,420.20 - Step 6: Final answer
x = 939,143.98
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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.