Finding the Fourth Proportional to 768,139.12, 1,149,976.32 and 447,311.62
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Solution
The fourth proportional to 768,139.12, 1,149,976.32 and 447,311.62 is: 669,667.46
Step by Step Solution
- Step 1: Write the proportion equation
768,139.12 : 1,149,976.32 = 447,311.62 : x - Step 2: Convert to fraction form
768,139.12/1,149,976.32 = 447,311.62/x - Step 3: Cross multiply
768,139.12x = 1,149,976.32 × 447,311.62 - Step 4: Simplify right side
768,139.12x = 514,397,770,660.84 - Step 5: Solve for x
x = 514,397,770,660.84/768,139.12 - Step 6: Final answer
x = 669,667.46
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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.