Finding the Fourth Proportional to 820,925,260.48, 1,231,387,889.48 and 207,509,486.20
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Solution
The fourth proportional to 820,925,260.48, 1,231,387,889.48 and 207,509,486.20 is: 311,264,228.99
Step by Step Solution
- Step 1: Write the proportion equation
820,925,260.48 : 1,231,387,889.48 = 207,509,486.20 : x - Step 2: Convert to fraction form
820,925,260.48/1,231,387,889.48 = 207,509,486.20/x - Step 3: Cross multiply
820,925,260.48x = 1,231,387,889.48 × 207,509,486.20 - Step 4: Simplify right side
820,925,260.48x = 255,524,668,258,897,184 - Step 5: Solve for x
x = 255,524,668,258,897,184/820,925,260.48 - Step 6: Final answer
x = 311,264,228.99
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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.