Finding the Fourth Proportional to 1,390,666,207.20, 2,086,279,246.80 and 408,090,847.20
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Solution
The fourth proportional to 1,390,666,207.20, 2,086,279,246.80 and 408,090,847.20 is: 612,218,417.99
Step by Step Solution
- Step 1: Write the proportion equation
1,390,666,207.20 : 2,086,279,246.80 = 408,090,847.20 : x - Step 2: Convert to fraction form
1,390,666,207.20/2,086,279,246.80 = 408,090,847.20/x - Step 3: Cross multiply
1,390,666,207.20x = 2,086,279,246.80 × 408,090,847.20 - Step 4: Simplify right side
1,390,666,207.20x = 851,391,465,322,389,888 - Step 5: Solve for x
x = 851,391,465,322,389,888/1,390,666,207.20 - Step 6: Final answer
x = 612,218,417.99
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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.