Finding the Fourth Proportional to 420.49, 629.70 and 246.70
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Solution
The fourth proportional to 420.49, 629.70 and 246.70 is: 369.44
Step by Step Solution
- Step 1: Write the proportion equation
420.49 : 629.70 = 246.70 : x - Step 2: Convert to fraction form
420.49/629.70 = 246.70/x - Step 3: Cross multiply
420.49x = 629.70 × 246.70 - Step 4: Simplify right side
420.49x = 155,346.99 - Step 5: Solve for x
x = 155,346.99/420.49 - Step 6: Final answer
x = 369.44
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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.