Finding the Fourth Proportional to 398,860.96, 550,431.64 and 217,573.70
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Solution
The fourth proportional to 398,860.96, 550,431.64 and 217,573.70 is: 300,253.62
Step by Step Solution
- Step 1: Write the proportion equation
398,860.96 : 550,431.64 = 217,573.70 : x - Step 2: Convert to fraction form
398,860.96/550,431.64 = 217,573.70/x - Step 3: Cross multiply
398,860.96x = 550,431.64 × 217,573.70 - Step 4: Simplify right side
398,860.96x = 119,759,445,759.71 - Step 5: Solve for x
x = 119,759,445,759.71/398,860.96 - Step 6: Final answer
x = 300,253.62
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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.