Finding the Fourth Proportional to 218,720.25, 301,965.17 and 143,399.97
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Solution
The fourth proportional to 218,720.25, 301,965.17 and 143,399.97 is: 197,977.99
Step by Step Solution
- Step 1: Write the proportion equation
218,720.25 : 301,965.17 = 143,399.97 : x - Step 2: Convert to fraction form
218,720.25/301,965.17 = 143,399.97/x - Step 3: Cross multiply
218,720.25x = 301,965.17 × 143,399.97 - Step 4: Simplify right side
218,720.25x = 43,301,795,602.05 - Step 5: Solve for x
x = 43,301,795,602.05/218,720.25 - Step 6: Final answer
x = 197,977.99
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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.