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Finding the Fourth Proportional to 251.21, 374.99 and 239.97

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Solution

The fourth proportional to 251.21, 374.99 and 239.97 is: 358.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.21 : 374.99 = 239.97 : x
  2. Step 2: Convert to fraction form
    251.21/374.99 = 239.97/x
  3. Step 3: Cross multiply
    251.21x = 374.99 × 239.97
  4. Step 4: Simplify right side
    251.21x = 89,986.35
  5. Step 5: Solve for x
    x = 89,986.35/251.21
  6. Step 6: Final answer
    x = 358.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.