Finding the Fourth Proportional to 428.44, 642.40 and 194.08
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Solution
The fourth proportional to 428.44, 642.40 and 194.08 is: 291.00
Step by Step Solution
- Step 1: Write the proportion equation
428.44 : 642.40 = 194.08 : x - Step 2: Convert to fraction form
428.44/642.40 = 194.08/x - Step 3: Cross multiply
428.44x = 642.40 × 194.08 - Step 4: Simplify right side
428.44x = 124,676.99 - Step 5: Solve for x
x = 124,676.99/428.44 - Step 6: Final answer
x = 291.00
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.