Finding the Fourth Proportional to 1,121,756.84, 1,548,160.26 and 638,439.56
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Solution
The fourth proportional to 1,121,756.84, 1,548,160.26 and 638,439.56 is: 881,123.89
Step by Step Solution
- Step 1: Write the proportion equation
1,121,756.84 : 1,548,160.26 = 638,439.56 : x - Step 2: Convert to fraction form
1,121,756.84/1,548,160.26 = 638,439.56/x - Step 3: Cross multiply
1,121,756.84x = 1,548,160.26 × 638,439.56 - Step 4: Simplify right side
1,121,756.84x = 988,406,755,203.89 - Step 5: Solve for x
x = 988,406,755,203.89/1,121,756.84 - Step 6: Final answer
x = 881,123.89
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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.