Finding the Fourth Proportional to 763,415.20, 1,145,122.80 and 343,511.20
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Solution
The fourth proportional to 763,415.20, 1,145,122.80 and 343,511.20 is: 515,266.80
Step by Step Solution
- Step 1: Write the proportion equation
763,415.20 : 1,145,122.80 = 343,511.20 : x - Step 2: Convert to fraction form
763,415.20/1,145,122.80 = 343,511.20/x - Step 3: Cross multiply
763,415.20x = 1,145,122.80 × 343,511.20 - Step 4: Simplify right side
763,415.20x = 393,362,507,175.36 - Step 5: Solve for x
x = 393,362,507,175.36/763,415.20 - Step 6: Final answer
x = 515,266.80
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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.