Finding the Fourth Proportional to 2,087.16, 3,128.45 and 853.09
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Solution
The fourth proportional to 2,087.16, 3,128.45 and 853.09 is: 1,278.70
Step by Step Solution
- Step 1: Write the proportion equation
2,087.16 : 3,128.45 = 853.09 : x - Step 2: Convert to fraction form
2,087.16/3,128.45 = 853.09/x - Step 3: Cross multiply
2,087.16x = 3,128.45 × 853.09 - Step 4: Simplify right side
2,087.16x = 2,668,849.41 - Step 5: Solve for x
x = 2,668,849.41/2,087.16 - Step 6: Final answer
x = 1,278.70
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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.