Finding the Fourth Proportional to 391,434.40, 587,243.58 and 121,548.75
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Solution
The fourth proportional to 391,434.40, 587,243.58 and 121,548.75 is: 182,351.69
Step by Step Solution
- Step 1: Write the proportion equation
391,434.40 : 587,243.58 = 121,548.75 : x - Step 2: Convert to fraction form
391,434.40/587,243.58 = 121,548.75/x - Step 3: Cross multiply
391,434.40x = 587,243.58 × 121,548.75 - Step 4: Simplify right side
391,434.40x = 71,378,723,094.53 - Step 5: Solve for x
x = 71,378,723,094.53/391,434.40 - Step 6: Final answer
x = 182,351.69
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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.