Finding the Fourth Proportional to 390.44, 585.80 and 236.68
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Solution
The fourth proportional to 390.44, 585.80 and 236.68 is: 355.10
Step by Step Solution
- Step 1: Write the proportion equation
390.44 : 585.80 = 236.68 : x - Step 2: Convert to fraction form
390.44/585.80 = 236.68/x - Step 3: Cross multiply
390.44x = 585.80 × 236.68 - Step 4: Simplify right side
390.44x = 138,647.14 - Step 5: Solve for x
x = 138,647.14/390.44 - Step 6: Final answer
x = 355.10
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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.