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Finding the Fourth Proportional to 251.44, 377.20 and 123.20

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Solution

The fourth proportional to 251.44, 377.20 and 123.20 is: 184.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.44 : 377.20 = 123.20 : x
  2. Step 2: Convert to fraction form
    251.44/377.20 = 123.20/x
  3. Step 3: Cross multiply
    251.44x = 377.20 × 123.20
  4. Step 4: Simplify right side
    251.44x = 46,471.04
  5. Step 5: Solve for x
    x = 46,471.04/251.44
  6. Step 6: Final answer
    x = 184.82

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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.