Finding the Fourth Proportional to 1,389,621.15, 1,917,240.13 and 777,676.68
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Solution
The fourth proportional to 1,389,621.15, 1,917,240.13 and 777,676.68 is: 1,072,949.23
Step by Step Solution
- Step 1: Write the proportion equation
1,389,621.15 : 1,917,240.13 = 777,676.68 : x - Step 2: Convert to fraction form
1,389,621.15/1,917,240.13 = 777,676.68/x - Step 3: Cross multiply
1,389,621.15x = 1,917,240.13 × 777,676.68 - Step 4: Simplify right side
1,389,621.15x = 1,490,992,940,033.26 - Step 5: Solve for x
x = 1,490,992,940,033.26/1,389,621.15 - Step 6: Final answer
x = 1,072,949.23
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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.