Finding the Fourth Proportional to 312,599.68, 431,228.84 and 197,684.79
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Solution
The fourth proportional to 312,599.68, 431,228.84 and 197,684.79 is: 272,704.64
Step by Step Solution
- Step 1: Write the proportion equation
312,599.68 : 431,228.84 = 197,684.79 : x - Step 2: Convert to fraction form
312,599.68/431,228.84 = 197,684.79/x - Step 3: Cross multiply
312,599.68x = 431,228.84 × 197,684.79 - Step 4: Simplify right side
312,599.68x = 85,247,381,908.15 - Step 5: Solve for x
x = 85,247,381,908.15/312,599.68 - Step 6: Final answer
x = 272,704.64
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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.