Finding the Fourth Proportional to 1,259,711,998.80, 1,889,567,998.20 and 386,448,147.60
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Solution
The fourth proportional to 1,259,711,998.80, 1,889,567,998.20 and 386,448,147.60 is: 579,672,221.40
Step by Step Solution
- Step 1: Write the proportion equation
1,259,711,998.80 : 1,889,567,998.20 = 386,448,147.60 : x - Step 2: Convert to fraction form
1,259,711,998.80/1,889,567,998.20 = 386,448,147.60/x - Step 3: Cross multiply
1,259,711,998.80x = 1,889,567,998.20 × 386,448,147.60 - Step 4: Simplify right side
1,259,711,998.80x = 730,220,052,668,630,144 - Step 5: Solve for x
x = 730,220,052,668,630,144/1,259,711,998.80 - Step 6: Final answer
x = 579,672,221.40
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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.