Finding the Fourth Proportional to 1,247,505,805.08, 1,721,571,615.90 and 690,598,152.36
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Solution
The fourth proportional to 1,247,505,805.08, 1,721,571,615.90 and 690,598,152.36 is: 953,032,981.69
Step by Step Solution
- Step 1: Write the proportion equation
1,247,505,805.08 : 1,721,571,615.90 = 690,598,152.36 : x - Step 2: Convert to fraction form
1,247,505,805.08/1,721,571,615.90 = 690,598,152.36/x - Step 3: Cross multiply
1,247,505,805.08x = 1,721,571,615.90 × 690,598,152.36 - Step 4: Simplify right side
1,247,505,805.08x = 1,188,914,177,095,959,808 - Step 5: Solve for x
x = 1,188,914,177,095,959,808/1,247,505,805.08 - Step 6: Final answer
x = 953,032,981.69
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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.