Finding the Fourth Proportional to 318,968.10, 439,981.34 and 189,819.99
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Solution
The fourth proportional to 318,968.10, 439,981.34 and 189,819.99 is: 261,835.75
Step by Step Solution
- Step 1: Write the proportion equation
318,968.10 : 439,981.34 = 189,819.99 : x - Step 2: Convert to fraction form
318,968.10/439,981.34 = 189,819.99/x - Step 3: Cross multiply
318,968.10x = 439,981.34 × 189,819.99 - Step 4: Simplify right side
318,968.10x = 83,517,252,609.89 - Step 5: Solve for x
x = 83,517,252,609.89/318,968.10 - Step 6: Final answer
x = 261,835.75
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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.