Finding the Fourth Proportional to 318.74, 478.08 and 155.93
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Solution
The fourth proportional to 318.74, 478.08 and 155.93 is: 233.88
Step by Step Solution
- Step 1: Write the proportion equation
318.74 : 478.08 = 155.93 : x - Step 2: Convert to fraction form
318.74/478.08 = 155.93/x - Step 3: Cross multiply
318.74x = 478.08 × 155.93 - Step 4: Simplify right side
318.74x = 74,548.21 - Step 5: Solve for x
x = 74,548.21/318.74 - Step 6: Final answer
x = 233.88
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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.