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Finding the Fourth Proportional to 222.90, 334.46 and 131.77

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Solution

The fourth proportional to 222.90, 334.46 and 131.77 is: 197.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.90 : 334.46 = 131.77 : x
  2. Step 2: Convert to fraction form
    222.90/334.46 = 131.77/x
  3. Step 3: Cross multiply
    222.90x = 334.46 × 131.77
  4. Step 4: Simplify right side
    222.90x = 44,071.79
  5. Step 5: Solve for x
    x = 44,071.79/222.90
  6. Step 6: Final answer
    x = 197.72

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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.