Finding the Fourth Proportional to 393,669,811.20, 590,504,716.80 and 212,271,283.20
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Solution
The fourth proportional to 393,669,811.20, 590,504,716.80 and 212,271,283.20 is: 318,406,924.80
Step by Step Solution
- Step 1: Write the proportion equation
393,669,811.20 : 590,504,716.80 = 212,271,283.20 : x - Step 2: Convert to fraction form
393,669,811.20/590,504,716.80 = 212,271,283.20/x - Step 3: Cross multiply
393,669,811.20x = 590,504,716.80 × 212,271,283.20 - Step 4: Simplify right side
393,669,811.20x = 125,347,193,970,788,576 - Step 5: Solve for x
x = 125,347,193,970,788,576/393,669,811.20 - Step 6: Final answer
x = 318,406,924.80
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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.