Finding the Fourth Proportional to 1,187,403.26, 1,638,622.11 and 643,538.88
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Solution
The fourth proportional to 1,187,403.26, 1,638,622.11 and 643,538.88 is: 888,086.70
Step by Step Solution
- Step 1: Write the proportion equation
1,187,403.26 : 1,638,622.11 = 643,538.88 : x - Step 2: Convert to fraction form
1,187,403.26/1,638,622.11 = 643,538.88/x - Step 3: Cross multiply
1,187,403.26x = 1,638,622.11 × 643,538.88 - Step 4: Simplify right side
1,187,403.26x = 1,054,517,037,412.64 - Step 5: Solve for x
x = 1,054,517,037,412.64/1,187,403.26 - Step 6: Final answer
x = 888,086.70
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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.