Finding the Fourth Proportional to 1,439.44, 2,160 and 515.79
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Solution
The fourth proportional to 1,439.44, 2,160 and 515.79 is: 773.99
Step by Step Solution
- Step 1: Write the proportion equation
1,439.44 : 2,160 = 515.79 : x - Step 2: Convert to fraction form
1,439.44/2,160 = 515.79/x - Step 3: Cross multiply
1,439.44x = 2,160 × 515.79 - Step 4: Simplify right side
1,439.44x = 1,114,106.40 - Step 5: Solve for x
x = 1,114,106.40/1,439.44 - Step 6: Final answer
x = 773.99
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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.