Finding the Fourth Proportional to 814,235.20, 1,221,352.80 and 394,331.20
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Solution
The fourth proportional to 814,235.20, 1,221,352.80 and 394,331.20 is: 591,496.80
Step by Step Solution
- Step 1: Write the proportion equation
814,235.20 : 1,221,352.80 = 394,331.20 : x - Step 2: Convert to fraction form
814,235.20/1,221,352.80 = 394,331.20/x - Step 3: Cross multiply
814,235.20x = 1,221,352.80 × 394,331.20 - Step 4: Simplify right side
814,235.20x = 481,617,515,247.36 - Step 5: Solve for x
x = 481,617,515,247.36/814,235.20 - Step 6: Final answer
x = 591,496.80
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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.