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Finding the Fourth Proportional to 239.46, 358.95 and 111.30

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Solution

The fourth proportional to 239.46, 358.95 and 111.30 is: 166.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.46 : 358.95 = 111.30 : x
  2. Step 2: Convert to fraction form
    239.46/358.95 = 111.30/x
  3. Step 3: Cross multiply
    239.46x = 358.95 × 111.30
  4. Step 4: Simplify right side
    239.46x = 39,951.14
  5. Step 5: Solve for x
    x = 39,951.14/239.46
  6. Step 6: Final answer
    x = 166.84

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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.