Finding the Fourth Proportional to 1,389,825,207.20, 2,085,090,681.72 and 643,379,121.92
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Solution
The fourth proportional to 1,389,825,207.20, 2,085,090,681.72 and 643,379,121.92 is: 965,232,034.20
Step by Step Solution
- Step 1: Write the proportion equation
1,389,825,207.20 : 2,085,090,681.72 = 643,379,121.92 : x - Step 2: Convert to fraction form
1,389,825,207.20/2,085,090,681.72 = 643,379,121.92/x - Step 3: Cross multiply
1,389,825,207.20x = 2,085,090,681.72 × 643,379,121.92 - Step 4: Simplify right side
1,389,825,207.20x = 1,341,503,811,928,587,776 - Step 5: Solve for x
x = 1,341,503,811,928,587,776/1,389,825,207.20 - Step 6: Final answer
x = 965,232,034.20
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.