Finding the Fourth Proportional to 313.61, 470.40 and 130.99
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Solution
The fourth proportional to 313.61, 470.40 and 130.99 is: 196.48
Step by Step Solution
- Step 1: Write the proportion equation
313.61 : 470.40 = 130.99 : x - Step 2: Convert to fraction form
313.61/470.40 = 130.99/x - Step 3: Cross multiply
313.61x = 470.40 × 130.99 - Step 4: Simplify right side
313.61x = 61,619.29 - Step 5: Solve for x
x = 61,619.29/313.61 - Step 6: Final answer
x = 196.48
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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.