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Finding the Fourth Proportional to 251.52, 377.40 and 112.74

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Solution

The fourth proportional to 251.52, 377.40 and 112.74 is: 169.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.52 : 377.40 = 112.74 : x
  2. Step 2: Convert to fraction form
    251.52/377.40 = 112.74/x
  3. Step 3: Cross multiply
    251.52x = 377.40 × 112.74
  4. Step 4: Simplify right side
    251.52x = 42,548.08
  5. Step 5: Solve for x
    x = 42,548.08/251.52
  6. Step 6: Final answer
    x = 169.16

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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.