Finding the Fourth Proportional to 1,276,365,721.20, 1,914,548,581.80 and 664,145,689.20
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Solution
The fourth proportional to 1,276,365,721.20, 1,914,548,581.80 and 664,145,689.20 is: 996,218,533.80
Step by Step Solution
- Step 1: Write the proportion equation
1,276,365,721.20 : 1,914,548,581.80 = 664,145,689.20 : x - Step 2: Convert to fraction form
1,276,365,721.20/1,914,548,581.80 = 664,145,689.20/x - Step 3: Cross multiply
1,276,365,721.20x = 1,914,548,581.80 × 664,145,689.20 - Step 4: Simplify right side
1,276,365,721.20x = 1,271,539,187,366,443,520 - Step 5: Solve for x
x = 1,271,539,187,366,443,520/1,276,365,721.20 - Step 6: Final answer
x = 996,218,533.80
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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.