Finding the Fourth Proportional to 777,891.14, 1,073,489.80 and 420,195.14
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Solution
The fourth proportional to 777,891.14, 1,073,489.80 and 420,195.14 is: 579,869.31
Step by Step Solution
- Step 1: Write the proportion equation
777,891.14 : 1,073,489.80 = 420,195.14 : x - Step 2: Convert to fraction form
777,891.14/1,073,489.80 = 420,195.14/x - Step 3: Cross multiply
777,891.14x = 1,073,489.80 × 420,195.14 - Step 4: Simplify right side
777,891.14x = 451,075,196,799.57 - Step 5: Solve for x
x = 451,075,196,799.57/777,891.14 - Step 6: Final answer
x = 579,869.31
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1.5x scale
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.