Finding the Fourth Proportional to 1,390,804,624.40, 2,086,206,936.60 and 421,330,269.20
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Solution
The fourth proportional to 1,390,804,624.40, 2,086,206,936.60 and 421,330,269.20 is: 631,995,403.80
Step by Step Solution
- Step 1: Write the proportion equation
1,390,804,624.40 : 2,086,206,936.60 = 421,330,269.20 : x - Step 2: Convert to fraction form
1,390,804,624.40/2,086,206,936.60 = 421,330,269.20/x - Step 3: Cross multiply
1,390,804,624.40x = 2,086,206,936.60 × 421,330,269.20 - Step 4: Simplify right side
1,390,804,624.40x = 878,982,130,204,585,216 - Step 5: Solve for x
x = 878,982,130,204,585,216/1,390,804,624.40 - Step 6: Final answer
x = 631,995,403.80
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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.