Finding the Fourth Proportional to 1,456,128,464.80, 2,184,192,697.20 and 911,932,880.80
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Solution
The fourth proportional to 1,456,128,464.80, 2,184,192,697.20 and 911,932,880.80 is: 1,367,899,321.20
Step by Step Solution
- Step 1: Write the proportion equation
1,456,128,464.80 : 2,184,192,697.20 = 911,932,880.80 : x - Step 2: Convert to fraction form
1,456,128,464.80/2,184,192,697.20 = 911,932,880.80/x - Step 3: Cross multiply
1,456,128,464.80x = 2,184,192,697.20 × 911,932,880.80 - Step 4: Simplify right side
1,456,128,464.80x = 1,991,837,138,579,917,824 - Step 5: Solve for x
x = 1,991,837,138,579,917,824/1,456,128,464.80 - Step 6: Final answer
x = 1,367,899,321.20
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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.