Finding the Fourth Proportional to 579.79, 869.79 and 271.99
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Solution
The fourth proportional to 579.79, 869.79 and 271.99 is: 408.03
Step by Step Solution
- Step 1: Write the proportion equation
579.79 : 869.79 = 271.99 : x - Step 2: Convert to fraction form
579.79/869.79 = 271.99/x - Step 3: Cross multiply
579.79x = 869.79 × 271.99 - Step 4: Simplify right side
579.79x = 236,574.18 - Step 5: Solve for x
x = 236,574.18/579.79 - Step 6: Final answer
x = 408.03
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.