Finding the Fourth Proportional to 287,380.79, 431,138.21 and 87,700.80
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Solution
The fourth proportional to 287,380.79, 431,138.21 and 87,700.80 is: 131,571.65
Step by Step Solution
- Step 1: Write the proportion equation
287,380.79 : 431,138.21 = 87,700.80 : x - Step 2: Convert to fraction form
287,380.79/431,138.21 = 87,700.80/x - Step 3: Cross multiply
287,380.79x = 431,138.21 × 87,700.80 - Step 4: Simplify right side
287,380.79x = 37,811,165,489.06 - Step 5: Solve for x
x = 37,811,165,489.06/287,380.79 - Step 6: Final answer
x = 131,571.65
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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.