Finding the Fourth Proportional to 1,320,341,723.20, 1,980,512,584.80 and 861,176,699.20
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Solution
The fourth proportional to 1,320,341,723.20, 1,980,512,584.80 and 861,176,699.20 is: 1,291,765,048.80
Step by Step Solution
- Step 1: Write the proportion equation
1,320,341,723.20 : 1,980,512,584.80 = 861,176,699.20 : x - Step 2: Convert to fraction form
1,320,341,723.20/1,980,512,584.80 = 861,176,699.20/x - Step 3: Cross multiply
1,320,341,723.20x = 1,980,512,584.80 × 861,176,699.20 - Step 4: Simplify right side
1,320,341,723.20x = 1,705,571,290,502,124,032 - Step 5: Solve for x
x = 1,705,571,290,502,124,032/1,320,341,723.20 - Step 6: Final answer
x = 1,291,765,048.80
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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.