Finding the Fourth Proportional to 211,378.81, 291,713.94 and 115,889.53
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Solution
The fourth proportional to 211,378.81, 291,713.94 and 115,889.53 is: 159,933.68
Step by Step Solution
- Step 1: Write the proportion equation
211,378.81 : 291,713.94 = 115,889.53 : x - Step 2: Convert to fraction form
211,378.81/291,713.94 = 115,889.53/x - Step 3: Cross multiply
211,378.81x = 291,713.94 × 115,889.53 - Step 4: Simplify right side
211,378.81x = 33,806,591,401.05 - Step 5: Solve for x
x = 33,806,591,401.05/211,378.81 - Step 6: Final answer
x = 159,933.68
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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.