Finding the Fourth Proportional to 988,611.12, 1,481,889.24 and 420,356.88
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Solution
The fourth proportional to 988,611.12, 1,481,889.24 and 420,356.88 is: 630,098.45
Step by Step Solution
- Step 1: Write the proportion equation
988,611.12 : 1,481,889.24 = 420,356.88 : x - Step 2: Convert to fraction form
988,611.12/1,481,889.24 = 420,356.88/x - Step 3: Cross multiply
988,611.12x = 1,481,889.24 × 420,356.88 - Step 4: Simplify right side
988,611.12x = 622,922,337,431.97 - Step 5: Solve for x
x = 622,922,337,431.97/988,611.12 - Step 6: Final answer
x = 630,098.45
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1.5x scale
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.