Finding the Fourth Proportional to 398,403.90, 597,664.71 and 128,441.79
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Solution
The fourth proportional to 398,403.90, 597,664.71 and 128,441.79 is: 192,681.66
Step by Step Solution
- Step 1: Write the proportion equation
398,403.90 : 597,664.71 = 128,441.79 : x - Step 2: Convert to fraction form
398,403.90/597,664.71 = 128,441.79/x - Step 3: Cross multiply
398,403.90x = 597,664.71 × 128,441.79 - Step 4: Simplify right side
398,403.90x = 76,765,125,172.23 - Step 5: Solve for x
x = 76,765,125,172.23/398,403.90 - Step 6: Final answer
x = 192,681.66
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1.5x scale
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.