Finding the Fourth Proportional to 1,106,639,128.80, 1,659,958,693.20 and 340,734,232.80
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Solution
The fourth proportional to 1,106,639,128.80, 1,659,958,693.20 and 340,734,232.80 is: 511,101,349.20
Step by Step Solution
- Step 1: Write the proportion equation
1,106,639,128.80 : 1,659,958,693.20 = 340,734,232.80 : x - Step 2: Convert to fraction form
1,106,639,128.80/1,659,958,693.20 = 340,734,232.80/x - Step 3: Cross multiply
1,106,639,128.80x = 1,659,958,693.20 × 340,734,232.80 - Step 4: Simplify right side
1,106,639,128.80x = 565,604,751,807,192,640 - Step 5: Solve for x
x = 565,604,751,807,192,640/1,106,639,128.80 - Step 6: Final answer
x = 511,101,349.20
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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.