Finding the Fourth Proportional to 640.74, 884.19 and 378.75
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Solution
The fourth proportional to 640.74, 884.19 and 378.75 is: 522.66
Step by Step Solution
- Step 1: Write the proportion equation
640.74 : 884.19 = 378.75 : x - Step 2: Convert to fraction form
640.74/884.19 = 378.75/x - Step 3: Cross multiply
640.74x = 884.19 × 378.75 - Step 4: Simplify right side
640.74x = 334,886.96 - Step 5: Solve for x
x = 334,886.96/640.74 - Step 6: Final answer
x = 522.66
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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.