Finding the Fourth Proportional to 1,206,479,880.05, 1,809,717,146.24 and 321,165,440.15
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Solution
The fourth proportional to 1,206,479,880.05, 1,809,717,146.24 and 321,165,440.15 is: 481,747,448.44
Step by Step Solution
- Step 1: Write the proportion equation
1,206,479,880.05 : 1,809,717,146.24 = 321,165,440.15 : x - Step 2: Convert to fraction form
1,206,479,880.05/1,809,717,146.24 = 321,165,440.15/x - Step 3: Cross multiply
1,206,479,880.05x = 1,809,717,146.24 × 321,165,440.15 - Step 4: Simplify right side
1,206,479,880.05x = 581,218,603,808,516,992 - Step 5: Solve for x
x = 581,218,603,808,516,992/1,206,479,880.05 - Step 6: Final answer
x = 481,747,448.44
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Double scale
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Similar ratio
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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.