Finding the Fourth Proportional to 278,290.15, 416,878.75 and 128,325.13
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Solution
The fourth proportional to 278,290.15, 416,878.75 and 128,325.13 is: 192,231.09
Step by Step Solution
- Step 1: Write the proportion equation
278,290.15 : 416,878.75 = 128,325.13 : x - Step 2: Convert to fraction form
278,290.15/416,878.75 = 128,325.13/x - Step 3: Cross multiply
278,290.15x = 416,878.75 × 128,325.13 - Step 4: Simplify right side
278,290.15x = 53,496,018,906.20 - Step 5: Solve for x
x = 53,496,018,906.20/278,290.15 - Step 6: Final answer
x = 192,231.09
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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.