Finding the Fourth Proportional to 315,660.99, 435,609.57 and 172,421.13
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Solution
The fourth proportional to 315,660.99, 435,609.57 and 172,421.13 is: 237,939.74
Step by Step Solution
- Step 1: Write the proportion equation
315,660.99 : 435,609.57 = 172,421.13 : x - Step 2: Convert to fraction form
315,660.99/435,609.57 = 172,421.13/x - Step 3: Cross multiply
315,660.99x = 435,609.57 × 172,421.13 - Step 4: Simplify right side
315,660.99x = 75,108,294,298.21 - Step 5: Solve for x
x = 75,108,294,298.21/315,660.99 - Step 6: Final answer
x = 237,939.74
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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.