Finding the Fourth Proportional to 280.17, 386.59 and 155.81
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Solution
The fourth proportional to 280.17, 386.59 and 155.81 is: 214.99
Step by Step Solution
- Step 1: Write the proportion equation
280.17 : 386.59 = 155.81 : x - Step 2: Convert to fraction form
280.17/386.59 = 155.81/x - Step 3: Cross multiply
280.17x = 386.59 × 155.81 - Step 4: Simplify right side
280.17x = 60,233.81 - Step 5: Solve for x
x = 60,233.81/280.17 - Step 6: Final answer
x = 214.99
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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.