Finding the Fourth Proportional to 318,938.40, 478,234.80 and 131,968.80
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Solution
The fourth proportional to 318,938.40, 478,234.80 and 131,968.80 is: 197,881.70
Step by Step Solution
- Step 1: Write the proportion equation
318,938.40 : 478,234.80 = 131,968.80 : x - Step 2: Convert to fraction form
318,938.40/478,234.80 = 131,968.80/x - Step 3: Cross multiply
318,938.40x = 478,234.80 × 131,968.80 - Step 4: Simplify right side
318,938.40x = 63,112,072,674.24 - Step 5: Solve for x
x = 63,112,072,674.24/318,938.40 - Step 6: Final answer
x = 197,881.70
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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.