Finding the Fourth Proportional to 1,259,713,441.20, 1,889,570,161.80 and 647,493,409.20
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Solution
The fourth proportional to 1,259,713,441.20, 1,889,570,161.80 and 647,493,409.20 is: 971,240,113.80
Step by Step Solution
- Step 1: Write the proportion equation
1,259,713,441.20 : 1,889,570,161.80 = 647,493,409.20 : x - Step 2: Convert to fraction form
1,259,713,441.20/1,889,570,161.80 = 647,493,409.20/x - Step 3: Cross multiply
1,259,713,441.20x = 1,889,570,161.80 × 647,493,409.20 - Step 4: Simplify right side
1,259,713,441.20x = 1,223,484,225,986,477,568 - Step 5: Solve for x
x = 1,223,484,225,986,477,568/1,259,713,441.20 - Step 6: Final answer
x = 971,240,113.80
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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.