Finding the Fourth Proportional to 1,290,665.28, 1,781,161.36 and 709,912.96
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Solution
The fourth proportional to 1,290,665.28, 1,781,161.36 and 709,912.96 is: 979,703.69
Step by Step Solution
- Step 1: Write the proportion equation
1,290,665.28 : 1,781,161.36 = 709,912.96 : x - Step 2: Convert to fraction form
1,290,665.28/1,781,161.36 = 709,912.96/x - Step 3: Cross multiply
1,290,665.28x = 1,781,161.36 × 709,912.96 - Step 4: Simplify right side
1,290,665.28x = 1,264,469,533,315.23 - Step 5: Solve for x
x = 1,264,469,533,315.23/1,290,665.28 - Step 6: Final answer
x = 979,703.69
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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.