Finding the Fourth Proportional to 3,178,486.09, 4,386,259.13 and 1,728,218.05
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Solution
The fourth proportional to 3,178,486.09, 4,386,259.13 and 1,728,218.05 is: 2,384,912.81
Step by Step Solution
- Step 1: Write the proportion equation
3,178,486.09 : 4,386,259.13 = 1,728,218.05 : x - Step 2: Convert to fraction form
3,178,486.09/4,386,259.13 = 1,728,218.05/x - Step 3: Cross multiply
3,178,486.09x = 4,386,259.13 × 1,728,218.05 - Step 4: Simplify right side
3,178,486.09x = 7,580,412,190,557.79 - Step 5: Solve for x
x = 7,580,412,190,557.79/3,178,486.09 - Step 6: Final answer
x = 2,384,912.81
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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.