Finding the Fourth Proportional to 385.15, 532.06 and 306.99
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Solution
The fourth proportional to 385.15, 532.06 and 306.99 is: 424.09
Step by Step Solution
- Step 1: Write the proportion equation
385.15 : 532.06 = 306.99 : x - Step 2: Convert to fraction form
385.15/532.06 = 306.99/x - Step 3: Cross multiply
385.15x = 532.06 × 306.99 - Step 4: Simplify right side
385.15x = 163,337.10 - Step 5: Solve for x
x = 163,337.10/385.15 - Step 6: Final answer
x = 424.09
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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.