Finding the Fourth Proportional to 1,279,638,004.20, 1,919,457,006.30 and 726,726,787.80
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Solution
The fourth proportional to 1,279,638,004.20, 1,919,457,006.30 and 726,726,787.80 is: 1,090,090,181.70
Step by Step Solution
- Step 1: Write the proportion equation
1,279,638,004.20 : 1,919,457,006.30 = 726,726,787.80 : x - Step 2: Convert to fraction form
1,279,638,004.20/1,919,457,006.30 = 726,726,787.80/x - Step 3: Cross multiply
1,279,638,004.20x = 1,919,457,006.30 × 726,726,787.80 - Step 4: Simplify right side
1,279,638,004.20x = 1,394,920,824,508,603,136 - Step 5: Solve for x
x = 1,394,920,824,508,603,136/1,279,638,004.20 - Step 6: Final answer
x = 1,090,090,181.70
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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.