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Finding the Fourth Proportional to 385.14, 576.66 and 262.80

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Solution

The fourth proportional to 385.14, 576.66 and 262.80 is: 393.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.14 : 576.66 = 262.80 : x
  2. Step 2: Convert to fraction form
    385.14/576.66 = 262.80/x
  3. Step 3: Cross multiply
    385.14x = 576.66 × 262.80
  4. Step 4: Simplify right side
    385.14x = 151,546.25
  5. Step 5: Solve for x
    x = 151,546.25/385.14
  6. Step 6: Final answer
    x = 393.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.