Finding the Fourth Proportional to 390.63, 585.97 and 147.19
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Solution
The fourth proportional to 390.63, 585.97 and 147.19 is: 220.79
Step by Step Solution
- Step 1: Write the proportion equation
390.63 : 585.97 = 147.19 : x - Step 2: Convert to fraction form
390.63/585.97 = 147.19/x - Step 3: Cross multiply
390.63x = 585.97 × 147.19 - Step 4: Simplify right side
390.63x = 86,248.19 - Step 5: Solve for x
x = 86,248.19/390.63 - Step 6: Final answer
x = 220.79
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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.