Finding the Fourth Proportional to 278.99, 384.99 and 154.63
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Solution
The fourth proportional to 278.99, 384.99 and 154.63 is: 213.38
Step by Step Solution
- Step 1: Write the proportion equation
278.99 : 384.99 = 154.63 : x - Step 2: Convert to fraction form
278.99/384.99 = 154.63/x - Step 3: Cross multiply
278.99x = 384.99 × 154.63 - Step 4: Simplify right side
278.99x = 59,531.00 - Step 5: Solve for x
x = 59,531.00/278.99 - Step 6: Final answer
x = 213.38
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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.