Finding the Fourth Proportional to 311,987,721.80, 467,981,582.70 and 221,288,457.80
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Solution
The fourth proportional to 311,987,721.80, 467,981,582.70 and 221,288,457.80 is: 331,932,686.70
Step by Step Solution
- Step 1: Write the proportion equation
311,987,721.80 : 467,981,582.70 = 221,288,457.80 : x - Step 2: Convert to fraction form
311,987,721.80/467,981,582.70 = 221,288,457.80/x - Step 3: Cross multiply
311,987,721.80x = 467,981,582.70 × 221,288,457.80 - Step 4: Simplify right side
311,987,721.80x = 103,558,922,714,486,160 - Step 5: Solve for x
x = 103,558,922,714,486,160/311,987,721.80 - Step 6: Final answer
x = 331,932,686.70
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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.