Finding the Fourth Proportional to 389.13, 583.69 and 115.18
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Solution
The fourth proportional to 389.13, 583.69 and 115.18 is: 172.77
Step by Step Solution
- Step 1: Write the proportion equation
389.13 : 583.69 = 115.18 : x - Step 2: Convert to fraction form
389.13/583.69 = 115.18/x - Step 3: Cross multiply
389.13x = 583.69 × 115.18 - Step 4: Simplify right side
389.13x = 67,230.87 - Step 5: Solve for x
x = 67,230.87/389.13 - Step 6: Final answer
x = 172.77
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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.