Finding the Fourth Proportional to 221,491.20, 332,236.80 and 212,743.20
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Solution
The fourth proportional to 221,491.20, 332,236.80 and 212,743.20 is: 319,114.80
Step by Step Solution
- Step 1: Write the proportion equation
221,491.20 : 332,236.80 = 212,743.20 : x - Step 2: Convert to fraction form
221,491.20/332,236.80 = 212,743.20/x - Step 3: Cross multiply
221,491.20x = 332,236.80 × 212,743.20 - Step 4: Simplify right side
221,491.20x = 70,681,119,989.76 - Step 5: Solve for x
x = 70,681,119,989.76/221,491.20 - Step 6: Final answer
x = 319,114.80
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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.