Finding the Fourth Proportional to 387.68, 578.74 and 336.68
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Solution
The fourth proportional to 387.68, 578.74 and 336.68 is: 502.61
Step by Step Solution
- Step 1: Write the proportion equation
387.68 : 578.74 = 336.68 : x - Step 2: Convert to fraction form
387.68/578.74 = 336.68/x - Step 3: Cross multiply
387.68x = 578.74 × 336.68 - Step 4: Simplify right side
387.68x = 194,850.18 - Step 5: Solve for x
x = 194,850.18/387.68 - Step 6: Final answer
x = 502.61
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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.