Finding the Fourth Proportional to 420.40, 630.58 and 201.18
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Solution
The fourth proportional to 420.40, 630.58 and 201.18 is: 301.76
Step by Step Solution
- Step 1: Write the proportion equation
420.40 : 630.58 = 201.18 : x - Step 2: Convert to fraction form
420.40/630.58 = 201.18/x - Step 3: Cross multiply
420.40x = 630.58 × 201.18 - Step 4: Simplify right side
420.40x = 126,860.08 - Step 5: Solve for x
x = 126,860.08/420.40 - Step 6: Final answer
x = 301.76
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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.