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Finding the Fourth Proportional to 222.72, 335.78 and 207.87

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Solution

The fourth proportional to 222.72, 335.78 and 207.87 is: 313.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.72 : 335.78 = 207.87 : x
  2. Step 2: Convert to fraction form
    222.72/335.78 = 207.87/x
  3. Step 3: Cross multiply
    222.72x = 335.78 × 207.87
  4. Step 4: Simplify right side
    222.72x = 69,797.55
  5. Step 5: Solve for x
    x = 69,797.55/222.72
  6. Step 6: Final answer
    x = 313.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.