Finding the Fourth Proportional to 279.41, 385.59 and 155.09
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Solution
The fourth proportional to 279.41, 385.59 and 155.09 is: 214.03
Step by Step Solution
- Step 1: Write the proportion equation
279.41 : 385.59 = 155.09 : x - Step 2: Convert to fraction form
279.41/385.59 = 155.09/x - Step 3: Cross multiply
279.41x = 385.59 × 155.09 - Step 4: Simplify right side
279.41x = 59,801.15 - Step 5: Solve for x
x = 59,801.15/279.41 - Step 6: Final answer
x = 214.03
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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.