Finding the Fourth Proportional to 1,121,863.68, 1,548,403.20 and 638,461.44
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Solution
The fourth proportional to 1,121,863.68, 1,548,403.20 and 638,461.44 is: 881,208.43
Step by Step Solution
- Step 1: Write the proportion equation
1,121,863.68 : 1,548,403.20 = 638,461.44 : x - Step 2: Convert to fraction form
1,121,863.68/1,548,403.20 = 638,461.44/x - Step 3: Cross multiply
1,121,863.68x = 1,548,403.20 × 638,461.44 - Step 4: Simplify right side
1,121,863.68x = 988,595,736,772.61 - Step 5: Solve for x
x = 988,595,736,772.61/1,121,863.68 - Step 6: Final answer
x = 881,208.43
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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.