Finding the Fourth Proportional to 643,485.11, 888,033.17 and 388,787.09
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Solution
The fourth proportional to 643,485.11, 888,033.17 and 388,787.09 is: 536,540.51
Step by Step Solution
- Step 1: Write the proportion equation
643,485.11 : 888,033.17 = 388,787.09 : x - Step 2: Convert to fraction form
643,485.11/888,033.17 = 388,787.09/x - Step 3: Cross multiply
643,485.11x = 888,033.17 × 388,787.09 - Step 4: Simplify right side
643,485.11x = 345,255,828,519.58 - Step 5: Solve for x
x = 345,255,828,519.58/643,485.11 - Step 6: Final answer
x = 536,540.51
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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.