Finding the Fourth Proportional to 1,187,343.84, 1,638,540.18 and 643,480.68
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Solution
The fourth proportional to 1,187,343.84, 1,638,540.18 and 643,480.68 is: 888,006.42
Step by Step Solution
- Step 1: Write the proportion equation
1,187,343.84 : 1,638,540.18 = 643,480.68 : x - Step 2: Convert to fraction form
1,187,343.84/1,638,540.18 = 643,480.68/x - Step 3: Cross multiply
1,187,343.84x = 1,638,540.18 × 643,480.68 - Step 4: Simplify right side
1,187,343.84x = 1,054,368,949,233.72 - Step 5: Solve for x
x = 1,054,368,949,233.72/1,187,343.84 - Step 6: Final answer
x = 888,006.42
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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.