Finding the Fourth Proportional to 664,381.20, 996,571.80 and 221,149.20
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Solution
The fourth proportional to 664,381.20, 996,571.80 and 221,149.20 is: 331,723.80
Step by Step Solution
- Step 1: Write the proportion equation
664,381.20 : 996,571.80 = 221,149.20 : x - Step 2: Convert to fraction form
664,381.20/996,571.80 = 221,149.20/x - Step 3: Cross multiply
664,381.20x = 996,571.80 × 221,149.20 - Step 4: Simplify right side
664,381.20x = 220,391,056,312.56 - Step 5: Solve for x
x = 220,391,056,312.56/664,381.20 - Step 6: Final answer
x = 331,723.80
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Similar ratio
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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.