Finding the Fourth Proportional to 391.12, 539.93 and 266.99
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Solution
The fourth proportional to 391.12, 539.93 and 266.99 is: 368.57
Step by Step Solution
- Step 1: Write the proportion equation
391.12 : 539.93 = 266.99 : x - Step 2: Convert to fraction form
391.12/539.93 = 266.99/x - Step 3: Cross multiply
391.12x = 539.93 × 266.99 - Step 4: Simplify right side
391.12x = 144,153.21 - Step 5: Solve for x
x = 144,153.21/391.12 - Step 6: Final answer
x = 368.57
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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.