Finding the Fourth Proportional to 720,812.71, 994,681.38 and 398,503.99
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Solution
The fourth proportional to 720,812.71, 994,681.38 and 398,503.99 is: 549,913.30
Step by Step Solution
- Step 1: Write the proportion equation
720,812.71 : 994,681.38 = 398,503.99 : x - Step 2: Convert to fraction form
720,812.71/994,681.38 = 398,503.99/x - Step 3: Cross multiply
720,812.71x = 994,681.38 × 398,503.99 - Step 4: Simplify right side
720,812.71x = 396,384,498,708.71 - Step 5: Solve for x
x = 396,384,498,708.71/720,812.71 - Step 6: Final answer
x = 549,913.30
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1.5x scale
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.