Finding the Fourth Proportional to 318.14, 474.99 and 281.78
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Solution
The fourth proportional to 318.14, 474.99 and 281.78 is: 420.70
Step by Step Solution
- Step 1: Write the proportion equation
318.14 : 474.99 = 281.78 : x - Step 2: Convert to fraction form
318.14/474.99 = 281.78/x - Step 3: Cross multiply
318.14x = 474.99 × 281.78 - Step 4: Simplify right side
318.14x = 133,841.27 - Step 5: Solve for x
x = 133,841.27/318.14 - Step 6: Final answer
x = 420.70
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.