Finding the Fourth Proportional to 1,278,463,260.30, 1,917,694,890.45 and 865,214,738.70
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Solution
The fourth proportional to 1,278,463,260.30, 1,917,694,890.45 and 865,214,738.70 is: 1,297,822,108.05
Step by Step Solution
- Step 1: Write the proportion equation
1,278,463,260.30 : 1,917,694,890.45 = 865,214,738.70 : x - Step 2: Convert to fraction form
1,278,463,260.30/1,917,694,890.45 = 865,214,738.70/x - Step 3: Cross multiply
1,278,463,260.30x = 1,917,694,890.45 × 865,214,738.70 - Step 4: Simplify right side
1,278,463,260.30x = 1,659,217,883,547,022,080 - Step 5: Solve for x
x = 1,659,217,883,547,022,080/1,278,463,260.30 - Step 6: Final answer
x = 1,297,822,108.05
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1.5x scale
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.