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Finding the Fourth Proportional to 251.02, 376.90 and 141.55

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Solution

The fourth proportional to 251.02, 376.90 and 141.55 is: 212.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.02 : 376.90 = 141.55 : x
  2. Step 2: Convert to fraction form
    251.02/376.90 = 141.55/x
  3. Step 3: Cross multiply
    251.02x = 376.90 × 141.55
  4. Step 4: Simplify right side
    251.02x = 53,349.37
  5. Step 5: Solve for x
    x = 53,349.37/251.02
  6. Step 6: Final answer
    x = 212.53

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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.