Finding the Fourth Proportional to 392,917.24, 542,290.80 and 231,811.68
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Solution
The fourth proportional to 392,917.24, 542,290.80 and 231,811.68 is: 319,938.47
Step by Step Solution
- Step 1: Write the proportion equation
392,917.24 : 542,290.80 = 231,811.68 : x - Step 2: Convert to fraction form
392,917.24/542,290.80 = 231,811.68/x - Step 3: Cross multiply
392,917.24x = 542,290.80 × 231,811.68 - Step 4: Simplify right side
392,917.24x = 125,709,341,396.54 - Step 5: Solve for x
x = 125,709,341,396.54/392,917.24 - Step 6: Final answer
x = 319,938.47
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.