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Finding the Fourth Proportional to 384.44, 576.78 and 168.20

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Solution

The fourth proportional to 384.44, 576.78 and 168.20 is: 252.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.44 : 576.78 = 168.20 : x
  2. Step 2: Convert to fraction form
    384.44/576.78 = 168.20/x
  3. Step 3: Cross multiply
    384.44x = 576.78 × 168.20
  4. Step 4: Simplify right side
    384.44x = 97,014.40
  5. Step 5: Solve for x
    x = 97,014.40/384.44
  6. Step 6: Final answer
    x = 252.35

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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.