Finding the Fourth Proportional to 1,257,520,516.88, 1,735,337,616.40 and 721,760,366.80
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Solution
The fourth proportional to 1,257,520,516.88, 1,735,337,616.40 and 721,760,366.80 is: 996,005,947.99
Step by Step Solution
- Step 1: Write the proportion equation
1,257,520,516.88 : 1,735,337,616.40 = 721,760,366.80 : x - Step 2: Convert to fraction form
1,257,520,516.88/1,735,337,616.40 = 721,760,366.80/x - Step 3: Cross multiply
1,257,520,516.88x = 1,735,337,616.40 × 721,760,366.80 - Step 4: Simplify right side
1,257,520,516.88x = 1,252,497,914,534,701,568 - Step 5: Solve for x
x = 1,252,497,914,534,701,568/1,257,520,516.88 - Step 6: Final answer
x = 996,005,947.99
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1.5x scale
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.