Finding the Fourth Proportional to 636.68, 878.69 and 356.99
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Solution
The fourth proportional to 636.68, 878.69 and 356.99 is: 492.68
Step by Step Solution
- Step 1: Write the proportion equation
636.68 : 878.69 = 356.99 : x - Step 2: Convert to fraction form
636.68/878.69 = 356.99/x - Step 3: Cross multiply
636.68x = 878.69 × 356.99 - Step 4: Simplify right side
636.68x = 313,681.76 - Step 5: Solve for x
x = 313,681.76/636.68 - Step 6: Final answer
x = 492.68
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.