Finding the Fourth Proportional to 280,198.62, 386,816.79 and 216,393.18
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Solution
The fourth proportional to 280,198.62, 386,816.79 and 216,393.18 is: 298,732.79
Step by Step Solution
- Step 1: Write the proportion equation
280,198.62 : 386,816.79 = 216,393.18 : x - Step 2: Convert to fraction form
280,198.62/386,816.79 = 216,393.18/x - Step 3: Cross multiply
280,198.62x = 386,816.79 × 216,393.18 - Step 4: Simplify right side
280,198.62x = 83,704,515,265.49 - Step 5: Solve for x
x = 83,704,515,265.49/280,198.62 - Step 6: Final answer
x = 298,732.79
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.