Finding the Fourth Proportional to 315,678.60, 435,645.81 and 172,440.99
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Solution
The fourth proportional to 315,678.60, 435,645.81 and 172,440.99 is: 237,973.67
Step by Step Solution
- Step 1: Write the proportion equation
315,678.60 : 435,645.81 = 172,440.99 : x - Step 2: Convert to fraction form
315,678.60/435,645.81 = 172,440.99/x - Step 3: Cross multiply
315,678.60x = 435,645.81 × 172,440.99 - Step 4: Simplify right side
315,678.60x = 75,123,194,765.75 - Step 5: Solve for x
x = 75,123,194,765.75/315,678.60 - Step 6: Final answer
x = 237,973.67
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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.