Finding the Fourth Proportional to 621.53, 857.79 and 372.99
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Solution
The fourth proportional to 621.53, 857.79 and 372.99 is: 514.77
Step by Step Solution
- Step 1: Write the proportion equation
621.53 : 857.79 = 372.99 : x - Step 2: Convert to fraction form
621.53/857.79 = 372.99/x - Step 3: Cross multiply
621.53x = 857.79 × 372.99 - Step 4: Simplify right side
621.53x = 319,947.09 - Step 5: Solve for x
x = 319,947.09/621.53 - Step 6: Final answer
x = 514.77
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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.