Finding the Fourth Proportional to 317.99, 477.18 and 135.47
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Solution
The fourth proportional to 317.99, 477.18 and 135.47 is: 203.28
Step by Step Solution
- Step 1: Write the proportion equation
317.99 : 477.18 = 135.47 : x - Step 2: Convert to fraction form
317.99/477.18 = 135.47/x - Step 3: Cross multiply
317.99x = 477.18 × 135.47 - Step 4: Simplify right side
317.99x = 64,641.19 - Step 5: Solve for x
x = 64,641.19/317.99 - Step 6: Final answer
x = 203.28
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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.