Finding the Fourth Proportional to 290.17, 435.28 and 84.74
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Solution
The fourth proportional to 290.17, 435.28 and 84.74 is: 127.11
Step by Step Solution
- Step 1: Write the proportion equation
290.17 : 435.28 = 84.74 : x - Step 2: Convert to fraction form
290.17/435.28 = 84.74/x - Step 3: Cross multiply
290.17x = 435.28 × 84.74 - Step 4: Simplify right side
290.17x = 36,883.24 - Step 5: Solve for x
x = 36,883.24/290.17 - Step 6: Final answer
x = 127.11
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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.