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Finding the Fourth Proportional to 219.64, 304.72 and 211.72

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Solution

The fourth proportional to 219.64, 304.72 and 211.72 is: 293.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.64 : 304.72 = 211.72 : x
  2. Step 2: Convert to fraction form
    219.64/304.72 = 211.72/x
  3. Step 3: Cross multiply
    219.64x = 304.72 × 211.72
  4. Step 4: Simplify right side
    219.64x = 64,515.32
  5. Step 5: Solve for x
    x = 64,515.32/219.64
  6. Step 6: Final answer
    x = 293.73

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.