Finding the Fourth Proportional to 1,311.27, 1,809.51 and 744.09
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Solution
The fourth proportional to 1,311.27, 1,809.51 and 744.09 is: 1,026.82
Step by Step Solution
- Step 1: Write the proportion equation
1,311.27 : 1,809.51 = 744.09 : x - Step 2: Convert to fraction form
1,311.27/1,809.51 = 744.09/x - Step 3: Cross multiply
1,311.27x = 1,809.51 × 744.09 - Step 4: Simplify right side
1,311.27x = 1,346,438.30 - Step 5: Solve for x
x = 1,346,438.30/1,311.27 - Step 6: Final answer
x = 1,026.82
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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.