Finding the Fourth Proportional to 390.40, 584.91 and 332.08
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Solution
The fourth proportional to 390.40, 584.91 and 332.08 is: 497.53
Step by Step Solution
- Step 1: Write the proportion equation
390.40 : 584.91 = 332.08 : x - Step 2: Convert to fraction form
390.40/584.91 = 332.08/x - Step 3: Cross multiply
390.40x = 584.91 × 332.08 - Step 4: Simplify right side
390.40x = 194,236.91 - Step 5: Solve for x
x = 194,236.91/390.40 - Step 6: Final answer
x = 497.53
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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.