Finding the Fourth Proportional to 718.29, 989.21 and 617.99
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Solution
The fourth proportional to 718.29, 989.21 and 617.99 is: 851.07
Step by Step Solution
- Step 1: Write the proportion equation
718.29 : 989.21 = 617.99 : x - Step 2: Convert to fraction form
718.29/989.21 = 617.99/x - Step 3: Cross multiply
718.29x = 989.21 × 617.99 - Step 4: Simplify right side
718.29x = 611,318.49 - Step 5: Solve for x
x = 611,318.49/718.29 - Step 6: Final answer
x = 851.07
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.