Finding the Fourth Proportional to 777,724.80, 1,073,259.98 and 420,028.80
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Solution
The fourth proportional to 777,724.80, 1,073,259.98 and 420,028.80 is: 579,639.61
Step by Step Solution
- Step 1: Write the proportion equation
777,724.80 : 1,073,259.98 = 420,028.80 : x - Step 2: Convert to fraction form
777,724.80/1,073,259.98 = 420,028.80/x - Step 3: Cross multiply
777,724.80x = 1,073,259.98 × 420,028.80 - Step 4: Simplify right side
777,724.80x = 450,800,101,487.42 - Step 5: Solve for x
x = 450,800,101,487.42/777,724.80 - Step 6: Final answer
x = 579,639.61
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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.