Finding the Fourth Proportional to 1,411.21, 2,116.50 and 486.73
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Solution
The fourth proportional to 1,411.21, 2,116.50 and 486.73 is: 729.99
Step by Step Solution
- Step 1: Write the proportion equation
1,411.21 : 2,116.50 = 486.73 : x - Step 2: Convert to fraction form
1,411.21/2,116.50 = 486.73/x - Step 3: Cross multiply
1,411.21x = 2,116.50 × 486.73 - Step 4: Simplify right side
1,411.21x = 1,030,164.05 - Step 5: Solve for x
x = 1,030,164.05/1,411.21 - Step 6: Final answer
x = 729.99
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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.