Finding the Fourth Proportional to 718,717.50, 991,812.76 and 396,420.68
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Solution
The fourth proportional to 718,717.50, 991,812.76 and 396,420.68 is: 547,050.95
Step by Step Solution
- Step 1: Write the proportion equation
718,717.50 : 991,812.76 = 396,420.68 : x - Step 2: Convert to fraction form
718,717.50/991,812.76 = 396,420.68/x - Step 3: Cross multiply
718,717.50x = 991,812.76 × 396,420.68 - Step 4: Simplify right side
718,717.50x = 393,175,088,751.88 - Step 5: Solve for x
x = 393,175,088,751.88/718,717.50 - Step 6: Final answer
x = 547,050.95
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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.