Finding the Fourth Proportional to 843.19, 1,264.21 and 431.99
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Solution
The fourth proportional to 843.19, 1,264.21 and 431.99 is: 647.69
Step by Step Solution
- Step 1: Write the proportion equation
843.19 : 1,264.21 = 431.99 : x - Step 2: Convert to fraction form
843.19/1,264.21 = 431.99/x - Step 3: Cross multiply
843.19x = 1,264.21 × 431.99 - Step 4: Simplify right side
843.19x = 546,126.08 - Step 5: Solve for x
x = 546,126.08/843.19 - Step 6: Final answer
x = 647.69
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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.