Finding the Fourth Proportional to 720,981,003.20, 1,081,471,504.80 and 478,643,907.20
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Solution
The fourth proportional to 720,981,003.20, 1,081,471,504.80 and 478,643,907.20 is: 717,965,860.80
Step by Step Solution
- Step 1: Write the proportion equation
720,981,003.20 : 1,081,471,504.80 = 478,643,907.20 : x - Step 2: Convert to fraction form
720,981,003.20/1,081,471,504.80 = 478,643,907.20/x - Step 3: Cross multiply
720,981,003.20x = 1,081,471,504.80 × 478,643,907.20 - Step 4: Simplify right side
720,981,003.20x = 517,639,746,582,935,488 - Step 5: Solve for x
x = 517,639,746,582,935,488/720,981,003.20 - Step 6: Final answer
x = 717,965,860.80
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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.