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Finding the Fourth Proportional to 384.06, 576.40 and 221.86

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Solution

The fourth proportional to 384.06, 576.40 and 221.86 is: 332.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.06 : 576.40 = 221.86 : x
  2. Step 2: Convert to fraction form
    384.06/576.40 = 221.86/x
  3. Step 3: Cross multiply
    384.06x = 576.40 × 221.86
  4. Step 4: Simplify right side
    384.06x = 127,880.10
  5. Step 5: Solve for x
    x = 127,880.10/384.06
  6. Step 6: Final answer
    x = 332.97

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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.