Finding the Fourth Proportional to 392,991.40, 588,320.70 and 260,021.80
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Solution
The fourth proportional to 392,991.40, 588,320.70 and 260,021.80 is: 389,260.95
Step by Step Solution
- Step 1: Write the proportion equation
392,991.40 : 588,320.70 = 260,021.80 : x - Step 2: Convert to fraction form
392,991.40/588,320.70 = 260,021.80/x - Step 3: Cross multiply
392,991.40x = 588,320.70 × 260,021.80 - Step 4: Simplify right side
392,991.40x = 152,976,207,391.26 - Step 5: Solve for x
x = 152,976,207,391.26/392,991.40 - Step 6: Final answer
x = 389,260.95
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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.