Finding the Fourth Proportional to 1,389,790.31, 1,917,943.10 and 777,927.84
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Solution
The fourth proportional to 1,389,790.31, 1,917,943.10 and 777,927.84 is: 1,073,558.60
Step by Step Solution
- Step 1: Write the proportion equation
1,389,790.31 : 1,917,943.10 = 777,927.84 : x - Step 2: Convert to fraction form
1,389,790.31/1,917,943.10 = 777,927.84/x - Step 3: Cross multiply
1,389,790.31x = 1,917,943.10 × 777,927.84 - Step 4: Simplify right side
1,389,790.31x = 1,492,021,329,136.26 - Step 5: Solve for x
x = 1,492,021,329,136.26/1,389,790.31 - Step 6: Final answer
x = 1,073,558.60
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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.