Finding the Fourth Proportional to 305,121.20, 457,681.80 and 211,809.20
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Solution
The fourth proportional to 305,121.20, 457,681.80 and 211,809.20 is: 317,713.80
Step by Step Solution
- Step 1: Write the proportion equation
305,121.20 : 457,681.80 = 211,809.20 : x - Step 2: Convert to fraction form
305,121.20/457,681.80 = 211,809.20/x - Step 3: Cross multiply
305,121.20x = 457,681.80 × 211,809.20 - Step 4: Simplify right side
305,121.20x = 96,941,215,912.56 - Step 5: Solve for x
x = 96,941,215,912.56/305,121.20 - Step 6: Final answer
x = 317,713.80
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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.