Finding the Fourth Proportional to 981,208.20, 1,471,812.30 and 768,631.80
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Solution
The fourth proportional to 981,208.20, 1,471,812.30 and 768,631.80 is: 1,152,947.70
Step by Step Solution
- Step 1: Write the proportion equation
981,208.20 : 1,471,812.30 = 768,631.80 : x - Step 2: Convert to fraction form
981,208.20/1,471,812.30 = 768,631.80/x - Step 3: Cross multiply
981,208.20x = 1,471,812.30 × 768,631.80 - Step 4: Simplify right side
981,208.20x = 1,131,281,737,411.14 - Step 5: Solve for x
x = 1,131,281,737,411.14/981,208.20 - Step 6: Final answer
x = 1,152,947.70
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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.