Finding the Fourth Proportional to 388,640.99, 536,310.39 and 216,550.05
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Solution
The fourth proportional to 388,640.99, 536,310.39 and 216,550.05 is: 298,831.17
Step by Step Solution
- Step 1: Write the proportion equation
388,640.99 : 536,310.39 = 216,550.05 : x - Step 2: Convert to fraction form
388,640.99/536,310.39 = 216,550.05/x - Step 3: Cross multiply
388,640.99x = 536,310.39 × 216,550.05 - Step 4: Simplify right side
388,640.99x = 116,138,041,770.02 - Step 5: Solve for x
x = 116,138,041,770.02/388,640.99 - Step 6: Final answer
x = 298,831.17
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.