Finding the Fourth Proportional to 206,981.80, 310,472.70 and 128,249.80
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Solution
The fourth proportional to 206,981.80, 310,472.70 and 128,249.80 is: 192,374.70
Step by Step Solution
- Step 1: Write the proportion equation
206,981.80 : 310,472.70 = 128,249.80 : x - Step 2: Convert to fraction form
206,981.80/310,472.70 = 128,249.80/x - Step 3: Cross multiply
206,981.80x = 310,472.70 × 128,249.80 - Step 4: Simplify right side
206,981.80x = 39,818,061,680.46 - Step 5: Solve for x
x = 39,818,061,680.46/206,981.80 - Step 6: Final answer
x = 192,374.70
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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.