Finding the Fourth Proportional to 319,408.40, 478,939.80 and 132,438.80
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Solution
The fourth proportional to 319,408.40, 478,939.80 and 132,438.80 is: 198,586.55
Step by Step Solution
- Step 1: Write the proportion equation
319,408.40 : 478,939.80 = 132,438.80 : x - Step 2: Convert to fraction form
319,408.40/478,939.80 = 132,438.80/x - Step 3: Cross multiply
319,408.40x = 478,939.80 × 132,438.80 - Step 4: Simplify right side
319,408.40x = 63,430,212,384.24 - Step 5: Solve for x
x = 63,430,212,384.24/319,408.40 - Step 6: Final answer
x = 198,586.55
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1.5x scale
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.