Finding the Fourth Proportional to 828.88, 1,143.84 and 479.56
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Solution
The fourth proportional to 828.88, 1,143.84 and 479.56 is: 661.78
Step by Step Solution
- Step 1: Write the proportion equation
828.88 : 1,143.84 = 479.56 : x - Step 2: Convert to fraction form
828.88/1,143.84 = 479.56/x - Step 3: Cross multiply
828.88x = 1,143.84 × 479.56 - Step 4: Simplify right side
828.88x = 548,539.91 - Step 5: Solve for x
x = 548,539.91/828.88 - Step 6: Final answer
x = 661.78
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.