Finding the Fourth Proportional to 542,991.80, 748,639.84 and 388,128.44
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Solution
The fourth proportional to 542,991.80, 748,639.84 and 388,128.44 is: 535,124.86
Step by Step Solution
- Step 1: Write the proportion equation
542,991.80 : 748,639.84 = 388,128.44 : x - Step 2: Convert to fraction form
542,991.80/748,639.84 = 388,128.44/x - Step 3: Cross multiply
542,991.80x = 748,639.84 × 388,128.44 - Step 4: Simplify right side
542,991.80x = 290,568,413,221.05 - Step 5: Solve for x
x = 290,568,413,221.05/542,991.80 - Step 6: Final answer
x = 535,124.86
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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.