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Finding the Fourth Proportional to 239.21, 358.33 and 141.47

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Solution

The fourth proportional to 239.21, 358.33 and 141.47 is: 211.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.21 : 358.33 = 141.47 : x
  2. Step 2: Convert to fraction form
    239.21/358.33 = 141.47/x
  3. Step 3: Cross multiply
    239.21x = 358.33 × 141.47
  4. Step 4: Simplify right side
    239.21x = 50,692.95
  5. Step 5: Solve for x
    x = 50,692.95/239.21
  6. Step 6: Final answer
    x = 211.92

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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.