Finding the Fourth Proportional to 390.26, 538.62 and 240.84
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Solution
The fourth proportional to 390.26, 538.62 and 240.84 is: 332.40
Step by Step Solution
- Step 1: Write the proportion equation
390.26 : 538.62 = 240.84 : x - Step 2: Convert to fraction form
390.26/538.62 = 240.84/x - Step 3: Cross multiply
390.26x = 538.62 × 240.84 - Step 4: Simplify right side
390.26x = 129,721.24 - Step 5: Solve for x
x = 129,721.24/390.26 - Step 6: Final answer
x = 332.40
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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.