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Finding the Fourth Proportional to 251.54, 377.58 and 213.49

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Solution

The fourth proportional to 251.54, 377.58 and 213.49 is: 320.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.54 : 377.58 = 213.49 : x
  2. Step 2: Convert to fraction form
    251.54/377.58 = 213.49/x
  3. Step 3: Cross multiply
    251.54x = 377.58 × 213.49
  4. Step 4: Simplify right side
    251.54x = 80,609.55
  5. Step 5: Solve for x
    x = 80,609.55/251.54
  6. Step 6: Final answer
    x = 320.46

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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.