Finding the Fourth Proportional to 820,724.87, 1,230,245.55 and 315,149.74
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Solution
The fourth proportional to 820,724.87, 1,230,245.55 and 315,149.74 is: 472,401.38
Step by Step Solution
- Step 1: Write the proportion equation
820,724.87 : 1,230,245.55 = 315,149.74 : x - Step 2: Convert to fraction form
820,724.87/1,230,245.55 = 315,149.74/x - Step 3: Cross multiply
820,724.87x = 1,230,245.55 × 315,149.74 - Step 4: Simplify right side
820,724.87x = 387,711,562,143.04 - Step 5: Solve for x
x = 387,711,562,143.04/820,724.87 - Step 6: Final answer
x = 472,401.38
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.