Finding the Fourth Proportional to 1,188,874,723.77, 1,640,450,266.95 and 687,130,229.94
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Solution
The fourth proportional to 1,188,874,723.77, 1,640,450,266.95 and 687,130,229.94 is: 948,125,943.46
Step by Step Solution
- Step 1: Write the proportion equation
1,188,874,723.77 : 1,640,450,266.95 = 687,130,229.94 : x - Step 2: Convert to fraction form
1,188,874,723.77/1,640,450,266.95 = 687,130,229.94/x - Step 3: Cross multiply
1,188,874,723.77x = 1,640,450,266.95 × 687,130,229.94 - Step 4: Simplify right side
1,188,874,723.77x = 1,127,202,969,134,488,064 - Step 5: Solve for x
x = 1,127,202,969,134,488,064/1,188,874,723.77 - Step 6: Final answer
x = 948,125,943.46
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.