Finding the Fourth Proportional to 2,120.15, 3,178.51 and 965.09
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Solution
The fourth proportional to 2,120.15, 3,178.51 and 965.09 is: 1,446.85
Step by Step Solution
- Step 1: Write the proportion equation
2,120.15 : 3,178.51 = 965.09 : x - Step 2: Convert to fraction form
2,120.15/3,178.51 = 965.09/x - Step 3: Cross multiply
2,120.15x = 3,178.51 × 965.09 - Step 4: Simplify right side
2,120.15x = 3,067,548.22 - Step 5: Solve for x
x = 3,067,548.22/2,120.15 - Step 6: Final answer
x = 1,446.85
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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.