Finding the Fourth Proportional to 809,940.80, 1,214,911.20 and 389,115.20
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Solution
The fourth proportional to 809,940.80, 1,214,911.20 and 389,115.20 is: 583,672.80
Step by Step Solution
- Step 1: Write the proportion equation
809,940.80 : 1,214,911.20 = 389,115.20 : x - Step 2: Convert to fraction form
809,940.80/1,214,911.20 = 389,115.20/x - Step 3: Cross multiply
809,940.80x = 1,214,911.20 × 389,115.20 - Step 4: Simplify right side
809,940.80x = 472,740,414,570.24 - Step 5: Solve for x
x = 472,740,414,570.24/809,940.80 - Step 6: Final answer
x = 583,672.80
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.