Finding the Fourth Proportional to 381,239.80, 571,859.70 and 209,997.70
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Solution
The fourth proportional to 381,239.80, 571,859.70 and 209,997.70 is: 314,996.55
Step by Step Solution
- Step 1: Write the proportion equation
381,239.80 : 571,859.70 = 209,997.70 : x - Step 2: Convert to fraction form
381,239.80/571,859.70 = 209,997.70/x - Step 3: Cross multiply
381,239.80x = 571,859.70 × 209,997.70 - Step 4: Simplify right side
381,239.80x = 120,089,221,722.69 - Step 5: Solve for x
x = 120,089,221,722.69/381,239.80 - Step 6: Final answer
x = 314,996.55
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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.