Finding the Fourth Proportional to 2,640.62, 3,961.30 and 909.02
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Solution
The fourth proportional to 2,640.62, 3,961.30 and 909.02 is: 1,363.66
Step by Step Solution
- Step 1: Write the proportion equation
2,640.62 : 3,961.30 = 909.02 : x - Step 2: Convert to fraction form
2,640.62/3,961.30 = 909.02/x - Step 3: Cross multiply
2,640.62x = 3,961.30 × 909.02 - Step 4: Simplify right side
2,640.62x = 3,600,900.93 - Step 5: Solve for x
x = 3,600,900.93/2,640.62 - Step 6: Final answer
x = 1,363.66
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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.