Finding the Fourth Proportional to 53.31, 80 and 19.09
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Solution
The fourth proportional to 53.31, 80 and 19.09 is: 28.65
Step by Step Solution
- Step 1: Write the proportion equation
53.31 : 80 = 19.09 : x - Step 2: Convert to fraction form
53.31/80 = 19.09/x - Step 3: Cross multiply
53.31x = 80 × 19.09 - Step 4: Simplify right side
53.31x = 1,527.20 - Step 5: Solve for x
x = 1,527.20/53.31 - Step 6: Final answer
x = 28.65
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.