Finding the Fourth Proportional to 1,389,825,210.70, 2,085,090,686.97 and 643,379,125.42
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Solution
The fourth proportional to 1,389,825,210.70, 2,085,090,686.97 and 643,379,125.42 is: 965,232,039.45
Step by Step Solution
- Step 1: Write the proportion equation
1,389,825,210.70 : 2,085,090,686.97 = 643,379,125.42 : x - Step 2: Convert to fraction form
1,389,825,210.70/2,085,090,686.97 = 643,379,125.42/x - Step 3: Cross multiply
1,389,825,210.70x = 2,085,090,686.97 × 643,379,125.42 - Step 4: Simplify right side
1,389,825,210.70x = 1,341,503,822,604,145,408 - Step 5: Solve for x
x = 1,341,503,822,604,145,408/1,389,825,210.70 - Step 6: Final answer
x = 965,232,039.45
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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.