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Finding the Fourth Proportional to 384.26, 576.46 and 127.76

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Solution

The fourth proportional to 384.26, 576.46 and 127.76 is: 191.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.26 : 576.46 = 127.76 : x
  2. Step 2: Convert to fraction form
    384.26/576.46 = 127.76/x
  3. Step 3: Cross multiply
    384.26x = 576.46 × 127.76
  4. Step 4: Simplify right side
    384.26x = 73,648.53
  5. Step 5: Solve for x
    x = 73,648.53/384.26
  6. Step 6: Final answer
    x = 191.66

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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.