Finding the Fourth Proportional to 1,218,719.09, 1,681,811.67 and 674,843.21
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Solution
The fourth proportional to 1,218,719.09, 1,681,811.67 and 674,843.21 is: 931,272.18
Step by Step Solution
- Step 1: Write the proportion equation
1,218,719.09 : 1,681,811.67 = 674,843.21 : x - Step 2: Convert to fraction form
1,218,719.09/1,681,811.67 = 674,843.21/x - Step 3: Cross multiply
1,218,719.09x = 1,681,811.67 × 674,843.21 - Step 4: Simplify right side
1,218,719.09x = 1,134,959,185,998.26 - Step 5: Solve for x
x = 1,134,959,185,998.26/1,218,719.09 - Step 6: Final answer
x = 931,272.18
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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.