Finding the Fourth Proportional to 1,258,743,612.05, 1,888,115,418.08 and 768,967,586.45
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Solution
The fourth proportional to 1,258,743,612.05, 1,888,115,418.08 and 768,967,586.45 is: 1,153,451,379.68
Step by Step Solution
- Step 1: Write the proportion equation
1,258,743,612.05 : 1,888,115,418.08 = 768,967,586.45 : x - Step 2: Convert to fraction form
1,258,743,612.05/1,888,115,418.08 = 768,967,586.45/x - Step 3: Cross multiply
1,258,743,612.05x = 1,888,115,418.08 × 768,967,586.45 - Step 4: Simplify right side
1,258,743,612.05x = 1,451,899,555,980,010,240 - Step 5: Solve for x
x = 1,451,899,555,980,010,240/1,258,743,612.05 - Step 6: Final answer
x = 1,153,451,379.68
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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.