Finding the Fourth Proportional to 1,389,220.77, 1,917,059.49 and 777,451.26
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Solution
The fourth proportional to 1,389,220.77, 1,917,059.49 and 777,451.26 is: 1,072,846.27
Step by Step Solution
- Step 1: Write the proportion equation
1,389,220.77 : 1,917,059.49 = 777,451.26 : x - Step 2: Convert to fraction form
1,389,220.77/1,917,059.49 = 777,451.26/x - Step 3: Cross multiply
1,389,220.77x = 1,917,059.49 × 777,451.26 - Step 4: Simplify right side
1,389,220.77x = 1,490,420,315,995.46 - Step 5: Solve for x
x = 1,490,420,315,995.46/1,389,220.77 - Step 6: Final answer
x = 1,072,846.27
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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.