Finding the Fourth Proportional to 1,389,615.09, 1,917,231.69 and 777,670.62
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Solution
The fourth proportional to 1,389,615.09, 1,917,231.69 and 777,670.62 is: 1,072,940.82
Step by Step Solution
- Step 1: Write the proportion equation
1,389,615.09 : 1,917,231.69 = 777,670.62 : x - Step 2: Convert to fraction form
1,389,615.09/1,917,231.69 = 777,670.62/x - Step 3: Cross multiply
1,389,615.09x = 1,917,231.69 × 777,670.62 - Step 4: Simplify right side
1,389,615.09x = 1,490,974,757,045.95 - Step 5: Solve for x
x = 1,490,974,757,045.95/1,389,615.09 - Step 6: Final answer
x = 1,072,940.82
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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.