Finding the Fourth Proportional to 919,728.36, 1,268,139.51 and 629,479.98
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Solution
The fourth proportional to 919,728.36, 1,268,139.51 and 629,479.98 is: 867,939.35
Step by Step Solution
- Step 1: Write the proportion equation
919,728.36 : 1,268,139.51 = 629,479.98 : x - Step 2: Convert to fraction form
919,728.36/1,268,139.51 = 629,479.98/x - Step 3: Cross multiply
919,728.36x = 1,268,139.51 × 629,479.98 - Step 4: Simplify right side
919,728.36x = 798,268,433,392.01 - Step 5: Solve for x
x = 798,268,433,392.01/919,728.36 - Step 6: Final answer
x = 867,939.35
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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.