Finding the Fourth Proportional to 2,639,239,615.80, 3,957,851,654.10 and 798,380,479.80
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Solution
The fourth proportional to 2,639,239,615.80, 3,957,851,654.10 and 798,380,479.80 is: 1,197,265,865.39
Step by Step Solution
- Step 1: Write the proportion equation
2,639,239,615.80 : 3,957,851,654.10 = 798,380,479.80 : x - Step 2: Convert to fraction form
2,639,239,615.80/3,957,851,654.10 = 798,380,479.80/x - Step 3: Cross multiply
2,639,239,615.80x = 3,957,851,654.10 × 798,380,479.80 - Step 4: Simplify right side
2,639,239,615.80x = 3,159,871,502,577,581,568 - Step 5: Solve for x
x = 3,159,871,502,577,581,568/2,639,239,615.80 - Step 6: Final answer
x = 1,197,265,865.39
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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.