Finding the Fourth Proportional to 492.68, 679.78 and 317.99
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Solution
The fourth proportional to 492.68, 679.78 and 317.99 is: 438.75
Step by Step Solution
- Step 1: Write the proportion equation
492.68 : 679.78 = 317.99 : x - Step 2: Convert to fraction form
492.68/679.78 = 317.99/x - Step 3: Cross multiply
492.68x = 679.78 × 317.99 - Step 4: Simplify right side
492.68x = 216,163.24 - Step 5: Solve for x
x = 216,163.24/492.68 - Step 6: Final answer
x = 438.75
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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.