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Finding the Fourth Proportional to 384.30, 576.32 and 153.11

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Solution

The fourth proportional to 384.30, 576.32 and 153.11 is: 229.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.30 : 576.32 = 153.11 : x
  2. Step 2: Convert to fraction form
    384.30/576.32 = 153.11/x
  3. Step 3: Cross multiply
    384.30x = 576.32 × 153.11
  4. Step 4: Simplify right side
    384.30x = 88,241.03
  5. Step 5: Solve for x
    x = 88,241.03/384.30
  6. Step 6: Final answer
    x = 229.61

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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.