Finding the Fourth Proportional to 1,091.97, 1,638.27 and 312
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Solution
The fourth proportional to 1,091.97, 1,638.27 and 312 is: 468.09
Step by Step Solution
- Step 1: Write the proportion equation
1,091.97 : 1,638.27 = 312 : x - Step 2: Convert to fraction form
1,091.97/1,638.27 = 312/x - Step 3: Cross multiply
1,091.97x = 1,638.27 × 312 - Step 4: Simplify right side
1,091.97x = 511,140.24 - Step 5: Solve for x
x = 511,140.24/1,091.97 - Step 6: Final answer
x = 468.09
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.