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Finding the Fourth Proportional to 222.26, 308.12 and 210.55

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Solution

The fourth proportional to 222.26, 308.12 and 210.55 is: 291.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.26 : 308.12 = 210.55 : x
  2. Step 2: Convert to fraction form
    222.26/308.12 = 210.55/x
  3. Step 3: Cross multiply
    222.26x = 308.12 × 210.55
  4. Step 4: Simplify right side
    222.26x = 64,874.67
  5. Step 5: Solve for x
    x = 64,874.67/222.26
  6. Step 6: Final answer
    x = 291.89

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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.