Finding the Fourth Proportional to 315.63, 434.23 and 306.99
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Solution
The fourth proportional to 315.63, 434.23 and 306.99 is: 422.34
Step by Step Solution
- Step 1: Write the proportion equation
315.63 : 434.23 = 306.99 : x - Step 2: Convert to fraction form
315.63/434.23 = 306.99/x - Step 3: Cross multiply
315.63x = 434.23 × 306.99 - Step 4: Simplify right side
315.63x = 133,303.50 - Step 5: Solve for x
x = 133,303.50/315.63 - Step 6: Final answer
x = 422.34
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.