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Finding the Fourth Proportional to 251.61, 376.97 and 135.65

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Solution

The fourth proportional to 251.61, 376.97 and 135.65 is: 203.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.61 : 376.97 = 135.65 : x
  2. Step 2: Convert to fraction form
    251.61/376.97 = 135.65/x
  3. Step 3: Cross multiply
    251.61x = 376.97 × 135.65
  4. Step 4: Simplify right side
    251.61x = 51,133.42
  5. Step 5: Solve for x
    x = 51,133.42/251.61
  6. Step 6: Final answer
    x = 203.22

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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.