Finding the Fourth Proportional to 312.35, 430.97 and 187.99
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Solution
The fourth proportional to 312.35, 430.97 and 187.99 is: 259.38
Step by Step Solution
- Step 1: Write the proportion equation
312.35 : 430.97 = 187.99 : x - Step 2: Convert to fraction form
312.35/430.97 = 187.99/x - Step 3: Cross multiply
312.35x = 430.97 × 187.99 - Step 4: Simplify right side
312.35x = 81,018.05 - Step 5: Solve for x
x = 81,018.05/312.35 - Step 6: Final answer
x = 259.38
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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.