Finding the Fourth Proportional to 398,713.19, 598,129.52 and 128,751.12
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Solution
The fourth proportional to 398,713.19, 598,129.52 and 128,751.12 is: 193,145.97
Step by Step Solution
- Step 1: Write the proportion equation
398,713.19 : 598,129.52 = 128,751.12 : x - Step 2: Convert to fraction form
398,713.19/598,129.52 = 128,751.12/x - Step 3: Cross multiply
398,713.19x = 598,129.52 × 128,751.12 - Step 4: Simplify right side
398,713.19x = 77,009,844,961.31 - Step 5: Solve for x
x = 77,009,844,961.31/398,713.19 - Step 6: Final answer
x = 193,145.97
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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.