Finding the Fourth Proportional to 428,797.08, 643,288.50 and 129,252.60
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Solution
The fourth proportional to 428,797.08, 643,288.50 and 129,252.60 is: 193,906.90
Step by Step Solution
- Step 1: Write the proportion equation
428,797.08 : 643,288.50 = 129,252.60 : x - Step 2: Convert to fraction form
428,797.08/643,288.50 = 129,252.60/x - Step 3: Cross multiply
428,797.08x = 643,288.50 × 129,252.60 - Step 4: Simplify right side
428,797.08x = 83,146,711,175.10 - Step 5: Solve for x
x = 83,146,711,175.10/428,797.08 - Step 6: Final answer
x = 193,906.90
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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.