Finding the Fourth Proportional to 420.70, 580.44 and 254.95
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Solution
The fourth proportional to 420.70, 580.44 and 254.95 is: 351.75
Step by Step Solution
- Step 1: Write the proportion equation
420.70 : 580.44 = 254.95 : x - Step 2: Convert to fraction form
420.70/580.44 = 254.95/x - Step 3: Cross multiply
420.70x = 580.44 × 254.95 - Step 4: Simplify right side
420.70x = 147,983.18 - Step 5: Solve for x
x = 147,983.18/420.70 - Step 6: Final answer
x = 351.75
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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.