Finding the Fourth Proportional to 393,669,813.70, 590,504,720.55 and 212,271,285.70
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Solution
The fourth proportional to 393,669,813.70, 590,504,720.55 and 212,271,285.70 is: 318,406,928.55
Step by Step Solution
- Step 1: Write the proportion equation
393,669,813.70 : 590,504,720.55 = 212,271,285.70 : x - Step 2: Convert to fraction form
393,669,813.70/590,504,720.55 = 212,271,285.70/x - Step 3: Cross multiply
393,669,813.70x = 590,504,720.55 × 212,271,285.70 - Step 4: Simplify right side
393,669,813.70x = 125,347,196,243,067,696 - Step 5: Solve for x
x = 125,347,196,243,067,696/393,669,813.70 - Step 6: Final answer
x = 318,406,928.55
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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.