Finding the Fourth Proportional to 690,647.87, 1,035,186.21 and 420,179.80
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Solution
The fourth proportional to 690,647.87, 1,035,186.21 and 420,179.80 is: 629,791.75
Step by Step Solution
- Step 1: Write the proportion equation
690,647.87 : 1,035,186.21 = 420,179.80 : x - Step 2: Convert to fraction form
690,647.87/1,035,186.21 = 420,179.80/x - Step 3: Cross multiply
690,647.87x = 1,035,186.21 × 420,179.80 - Step 4: Simplify right side
690,647.87x = 434,964,329,143.98 - Step 5: Solve for x
x = 434,964,329,143.98/690,647.87 - Step 6: Final answer
x = 629,791.75
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.