Finding the Fourth Proportional to 769,439.80, 1,154,159.70 and 415,145.80
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Solution
The fourth proportional to 769,439.80, 1,154,159.70 and 415,145.80 is: 622,718.70
Step by Step Solution
- Step 1: Write the proportion equation
769,439.80 : 1,154,159.70 = 415,145.80 : x - Step 2: Convert to fraction form
769,439.80/1,154,159.70 = 415,145.80/x - Step 3: Cross multiply
769,439.80x = 1,154,159.70 × 415,145.80 - Step 4: Simplify right side
769,439.80x = 479,144,551,984.26 - Step 5: Solve for x
x = 479,144,551,984.26/769,439.80 - Step 6: Final answer
x = 622,718.70
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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.