Finding the Fourth Proportional to 311,893.20, 430,479.32 and 197,098.79
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Solution
The fourth proportional to 311,893.20, 430,479.32 and 197,098.79 is: 272,038.47
Step by Step Solution
- Step 1: Write the proportion equation
311,893.20 : 430,479.32 = 197,098.79 : x - Step 2: Convert to fraction form
311,893.20/430,479.32 = 197,098.79/x - Step 3: Cross multiply
311,893.20x = 430,479.32 × 197,098.79 - Step 4: Simplify right side
311,893.20x = 84,846,949,954.13 - Step 5: Solve for x
x = 84,846,949,954.13/311,893.20 - Step 6: Final answer
x = 272,038.47
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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.