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Finding the Fourth Proportional to 384.11, 576.06 and 140.81

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Solution

The fourth proportional to 384.11, 576.06 and 140.81 is: 211.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.11 : 576.06 = 140.81 : x
  2. Step 2: Convert to fraction form
    384.11/576.06 = 140.81/x
  3. Step 3: Cross multiply
    384.11x = 576.06 × 140.81
  4. Step 4: Simplify right side
    384.11x = 81,112.13
  5. Step 5: Solve for x
    x = 81,112.13/384.11
  6. Step 6: Final answer
    x = 211.17

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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.