Finding the Fourth Proportional to 311,291.76, 466,992.36 and 128,920.56
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Solution
The fourth proportional to 311,291.76, 466,992.36 and 128,920.56 is: 193,403.50
Step by Step Solution
- Step 1: Write the proportion equation
311,291.76 : 466,992.36 = 128,920.56 : x - Step 2: Convert to fraction form
311,291.76/466,992.36 = 128,920.56/x - Step 3: Cross multiply
311,291.76x = 466,992.36 × 128,920.56 - Step 4: Simplify right side
311,291.76x = 60,204,916,566.92 - Step 5: Solve for x
x = 60,204,916,566.92/311,291.76 - Step 6: Final answer
x = 193,403.50
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1.5x scale
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.