Finding the Fourth Proportional to 858,476,728.80, 1,287,715,093.20 and 720,727,221.60
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Solution
The fourth proportional to 858,476,728.80, 1,287,715,093.20 and 720,727,221.60 is: 1,081,090,832.40
Step by Step Solution
- Step 1: Write the proportion equation
858,476,728.80 : 1,287,715,093.20 = 720,727,221.60 : x - Step 2: Convert to fraction form
858,476,728.80/1,287,715,093.20 = 720,727,221.60/x - Step 3: Cross multiply
858,476,728.80x = 1,287,715,093.20 × 720,727,221.60 - Step 4: Simplify right side
858,476,728.80x = 928,091,321,334,421,120 - Step 5: Solve for x
x = 928,091,321,334,421,120/858,476,728.80 - Step 6: Final answer
x = 1,081,090,832.40
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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.