Finding the Fourth Proportional to 257,351.40, 386,064.36 and 79,872.75
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Solution
The fourth proportional to 257,351.40, 386,064.36 and 79,872.75 is: 119,820.69
Step by Step Solution
- Step 1: Write the proportion equation
257,351.40 : 386,064.36 = 79,872.75 : x - Step 2: Convert to fraction form
257,351.40/386,064.36 = 79,872.75/x - Step 3: Cross multiply
257,351.40x = 386,064.36 × 79,872.75 - Step 4: Simplify right side
257,351.40x = 30,836,022,110.19 - Step 5: Solve for x
x = 30,836,022,110.19/257,351.40 - Step 6: Final answer
x = 119,820.69
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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.