Finding the Fourth Proportional to 720,841.71, 994,721.40 and 398,532.99
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Solution
The fourth proportional to 720,841.71, 994,721.40 and 398,532.99 is: 549,953.32
Step by Step Solution
- Step 1: Write the proportion equation
720,841.71 : 994,721.40 = 398,532.99 : x - Step 2: Convert to fraction form
720,841.71/994,721.40 = 398,532.99/x - Step 3: Cross multiply
720,841.71x = 994,721.40 × 398,532.99 - Step 4: Simplify right side
720,841.71x = 396,429,293,758.99 - Step 5: Solve for x
x = 396,429,293,758.99/720,841.71 - Step 6: Final answer
x = 549,953.32
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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.