Finding the Fourth Proportional to 403.68, 605.60 and 115.20
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Solution
The fourth proportional to 403.68, 605.60 and 115.20 is: 172.82
Step by Step Solution
- Step 1: Write the proportion equation
403.68 : 605.60 = 115.20 : x - Step 2: Convert to fraction form
403.68/605.60 = 115.20/x - Step 3: Cross multiply
403.68x = 605.60 × 115.20 - Step 4: Simplify right side
403.68x = 69,765.12 - Step 5: Solve for x
x = 69,765.12/403.68 - Step 6: Final answer
x = 172.82
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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.