Finding the Fourth Proportional to 655.79, 905.27 and 393.75
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Solution
The fourth proportional to 655.79, 905.27 and 393.75 is: 543.54
Step by Step Solution
- Step 1: Write the proportion equation
655.79 : 905.27 = 393.75 : x - Step 2: Convert to fraction form
655.79/905.27 = 393.75/x - Step 3: Cross multiply
655.79x = 905.27 × 393.75 - Step 4: Simplify right side
655.79x = 356,448.09 - Step 5: Solve for x
x = 356,448.09/655.79 - Step 6: Final answer
x = 543.54
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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.