Finding the Fourth Proportional to 419,135.92, 628,704.08 and 138,653.17
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Solution
The fourth proportional to 419,135.92, 628,704.08 and 138,653.17 is: 207,979.82
Step by Step Solution
- Step 1: Write the proportion equation
419,135.92 : 628,704.08 = 138,653.17 : x - Step 2: Convert to fraction form
419,135.92/628,704.08 = 138,653.17/x - Step 3: Cross multiply
419,135.92x = 628,704.08 × 138,653.17 - Step 4: Simplify right side
419,135.92x = 87,171,813,683.93 - Step 5: Solve for x
x = 87,171,813,683.93/419,135.92 - Step 6: Final answer
x = 207,979.82
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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.