Finding the Fourth Proportional to 206,979.80, 310,469.70 and 128,247.80
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Solution
The fourth proportional to 206,979.80, 310,469.70 and 128,247.80 is: 192,371.70
Step by Step Solution
- Step 1: Write the proportion equation
206,979.80 : 310,469.70 = 128,247.80 : x - Step 2: Convert to fraction form
206,979.80/310,469.70 = 128,247.80/x - Step 3: Cross multiply
206,979.80x = 310,469.70 × 128,247.80 - Step 4: Simplify right side
206,979.80x = 39,817,055,991.66 - Step 5: Solve for x
x = 39,817,055,991.66/206,979.80 - Step 6: Final answer
x = 192,371.70
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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.