Finding the Fourth Proportional to 318.60, 477.93 and 102.21
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Solution
The fourth proportional to 318.60, 477.93 and 102.21 is: 153.32
Step by Step Solution
- Step 1: Write the proportion equation
318.60 : 477.93 = 102.21 : x - Step 2: Convert to fraction form
318.60/477.93 = 102.21/x - Step 3: Cross multiply
318.60x = 477.93 × 102.21 - Step 4: Simplify right side
318.60x = 48,849.23 - Step 5: Solve for x
x = 48,849.23/318.60 - Step 6: Final answer
x = 153.32
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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.