Finding the Fourth Proportional to 318.24, 477.36 and 135.63
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Solution
The fourth proportional to 318.24, 477.36 and 135.63 is: 203.45
Step by Step Solution
- Step 1: Write the proportion equation
318.24 : 477.36 = 135.63 : x - Step 2: Convert to fraction form
318.24/477.36 = 135.63/x - Step 3: Cross multiply
318.24x = 477.36 × 135.63 - Step 4: Simplify right side
318.24x = 64,744.34 - Step 5: Solve for x
x = 64,744.34/318.24 - Step 6: Final answer
x = 203.45
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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.