Finding the Fourth Proportional to 1,258,743,623.30, 1,888,115,434.95 and 768,967,597.70
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Solution
The fourth proportional to 1,258,743,623.30, 1,888,115,434.95 and 768,967,597.70 is: 1,153,451,396.55
Step by Step Solution
- Step 1: Write the proportion equation
1,258,743,623.30 : 1,888,115,434.95 = 768,967,597.70 : x - Step 2: Convert to fraction form
1,258,743,623.30/1,888,115,434.95 = 768,967,597.70/x - Step 3: Cross multiply
1,258,743,623.30x = 1,888,115,434.95 × 768,967,597.70 - Step 4: Simplify right side
1,258,743,623.30x = 1,451,899,590,193,792,256 - Step 5: Solve for x
x = 1,451,899,590,193,792,256/1,258,743,623.30 - Step 6: Final answer
x = 1,153,451,396.55
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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.