Finding the Fourth Proportional to 1,247,505,823.08, 1,721,571,640.74 and 690,598,170.36
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Solution
The fourth proportional to 1,247,505,823.08, 1,721,571,640.74 and 690,598,170.36 is: 953,033,006.53
Step by Step Solution
- Step 1: Write the proportion equation
1,247,505,823.08 : 1,721,571,640.74 = 690,598,170.36 : x - Step 2: Convert to fraction form
1,247,505,823.08/1,721,571,640.74 = 690,598,170.36/x - Step 3: Cross multiply
1,247,505,823.08x = 1,721,571,640.74 × 690,598,170.36 - Step 4: Simplify right side
1,247,505,823.08x = 1,188,914,225,238,707,200 - Step 5: Solve for x
x = 1,188,914,225,238,707,200/1,247,505,823.08 - Step 6: Final answer
x = 953,033,006.53
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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.