Finding the Fourth Proportional to 2,158.30, 3,237.81 and 771.31
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Solution
The fourth proportional to 2,158.30, 3,237.81 and 771.31 is: 1,157.09
Step by Step Solution
- Step 1: Write the proportion equation
2,158.30 : 3,237.81 = 771.31 : x - Step 2: Convert to fraction form
2,158.30/3,237.81 = 771.31/x - Step 3: Cross multiply
2,158.30x = 3,237.81 × 771.31 - Step 4: Simplify right side
2,158.30x = 2,497,355.23 - Step 5: Solve for x
x = 2,497,355.23/2,158.30 - Step 6: Final answer
x = 1,157.09
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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.