Finding the Fourth Proportional to 1,278,929,379.28, 1,764,734,690.28 and 714,344,708.56
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Solution
The fourth proportional to 1,278,929,379.28, 1,764,734,690.28 and 714,344,708.56 is: 985,690,772.64
Step by Step Solution
- Step 1: Write the proportion equation
1,278,929,379.28 : 1,764,734,690.28 = 714,344,708.56 : x - Step 2: Convert to fraction form
1,278,929,379.28/1,764,734,690.28 = 714,344,708.56/x - Step 3: Cross multiply
1,278,929,379.28x = 1,764,734,690.28 × 714,344,708.56 - Step 4: Simplify right side
1,278,929,379.28x = 1,260,628,888,013,788,416 - Step 5: Solve for x
x = 1,260,628,888,013,788,416/1,278,929,379.28 - Step 6: Final answer
x = 985,690,772.64
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Double scale
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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.