Finding the Fourth Proportional to 1,258,743,603.80, 1,888,115,405.70 and 768,967,578.20
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Solution
The fourth proportional to 1,258,743,603.80, 1,888,115,405.70 and 768,967,578.20 is: 1,153,451,367.30
Step by Step Solution
- Step 1: Write the proportion equation
1,258,743,603.80 : 1,888,115,405.70 = 768,967,578.20 : x - Step 2: Convert to fraction form
1,258,743,603.80/1,888,115,405.70 = 768,967,578.20/x - Step 3: Cross multiply
1,258,743,603.80x = 1,888,115,405.70 × 768,967,578.20 - Step 4: Simplify right side
1,258,743,603.80x = 1,451,899,530,883,239,680 - Step 5: Solve for x
x = 1,451,899,530,883,239,680/1,258,743,603.80 - Step 6: Final answer
x = 1,153,451,367.30
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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.