Finding the Fourth Proportional to 486,427.80, 729,641.70 and 131,431.80
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Solution
The fourth proportional to 486,427.80, 729,641.70 and 131,431.80 is: 197,147.70
Step by Step Solution
- Step 1: Write the proportion equation
486,427.80 : 729,641.70 = 131,431.80 : x - Step 2: Convert to fraction form
486,427.80/729,641.70 = 131,431.80/x - Step 3: Cross multiply
486,427.80x = 729,641.70 × 131,431.80 - Step 4: Simplify right side
486,427.80x = 95,898,121,986.06 - Step 5: Solve for x
x = 95,898,121,986.06/486,427.80 - Step 6: Final answer
x = 197,147.70
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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.