Finding the Fourth Proportional to 389,857.80, 584,786.70 and 153,121.80
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Solution
The fourth proportional to 389,857.80, 584,786.70 and 153,121.80 is: 229,682.70
Step by Step Solution
- Step 1: Write the proportion equation
389,857.80 : 584,786.70 = 153,121.80 : x - Step 2: Convert to fraction form
389,857.80/584,786.70 = 153,121.80/x - Step 3: Cross multiply
389,857.80x = 584,786.70 × 153,121.80 - Step 4: Simplify right side
389,857.80x = 89,543,592,120.06 - Step 5: Solve for x
x = 89,543,592,120.06/389,857.80 - Step 6: Final answer
x = 229,682.70
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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.