Finding the Fourth Proportional to 390.24, 538.08 and 250.08
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Solution
The fourth proportional to 390.24, 538.08 and 250.08 is: 344.82
Step by Step Solution
- Step 1: Write the proportion equation
390.24 : 538.08 = 250.08 : x - Step 2: Convert to fraction form
390.24/538.08 = 250.08/x - Step 3: Cross multiply
390.24x = 538.08 × 250.08 - Step 4: Simplify right side
390.24x = 134,563.05 - Step 5: Solve for x
x = 134,563.05/390.24 - Step 6: Final answer
x = 344.82
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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.