Finding the Fourth Proportional to 438.62, 605.26 and 355.93
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Solution
The fourth proportional to 438.62, 605.26 and 355.93 is: 491.15
Step by Step Solution
- Step 1: Write the proportion equation
438.62 : 605.26 = 355.93 : x - Step 2: Convert to fraction form
438.62/605.26 = 355.93/x - Step 3: Cross multiply
438.62x = 605.26 × 355.93 - Step 4: Simplify right side
438.62x = 215,430.19 - Step 5: Solve for x
x = 215,430.19/438.62 - Step 6: Final answer
x = 491.15
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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.