Finding the Fourth Proportional to 318,943.20, 478,414.80 and 129,403.20
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Solution
The fourth proportional to 318,943.20, 478,414.80 and 129,403.20 is: 194,104.80
Step by Step Solution
- Step 1: Write the proportion equation
318,943.20 : 478,414.80 = 129,403.20 : x - Step 2: Convert to fraction form
318,943.20/478,414.80 = 129,403.20/x - Step 3: Cross multiply
318,943.20x = 478,414.80 × 129,403.20 - Step 4: Simplify right side
318,943.20x = 61,908,406,047.36 - Step 5: Solve for x
x = 61,908,406,047.36/318,943.20 - Step 6: Final answer
x = 194,104.80
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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.