Finding the Fourth Proportional to 1,399,290.21, 2,098,947.08 and 388,490.99
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Solution
The fourth proportional to 1,399,290.21, 2,098,947.08 and 388,490.99 is: 582,739.74
Step by Step Solution
- Step 1: Write the proportion equation
1,399,290.21 : 2,098,947.08 = 388,490.99 : x - Step 2: Convert to fraction form
1,399,290.21/2,098,947.08 = 388,490.99/x - Step 3: Cross multiply
1,399,290.21x = 2,098,947.08 × 388,490.99 - Step 4: Simplify right side
1,399,290.21x = 815,422,017,358.04 - Step 5: Solve for x
x = 815,422,017,358.04/1,399,290.21 - Step 6: Final answer
x = 582,739.74
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.