Finding the Fourth Proportional to 290.86, 400.95 and 220.99
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Solution
The fourth proportional to 290.86, 400.95 and 220.99 is: 304.63
Step by Step Solution
- Step 1: Write the proportion equation
290.86 : 400.95 = 220.99 : x - Step 2: Convert to fraction form
290.86/400.95 = 220.99/x - Step 3: Cross multiply
290.86x = 400.95 × 220.99 - Step 4: Simplify right side
290.86x = 88,605.94 - Step 5: Solve for x
x = 88,605.94/290.86 - Step 6: Final answer
x = 304.63
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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.