Finding the Fourth Proportional to 639.74, 959.06 and 274.79
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Solution
The fourth proportional to 639.74, 959.06 and 274.79 is: 411.95
Step by Step Solution
- Step 1: Write the proportion equation
639.74 : 959.06 = 274.79 : x - Step 2: Convert to fraction form
639.74/959.06 = 274.79/x - Step 3: Cross multiply
639.74x = 959.06 × 274.79 - Step 4: Simplify right side
639.74x = 263,535.99 - Step 5: Solve for x
x = 263,535.99/639.74 - Step 6: Final answer
x = 411.95
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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.