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Finding the Fourth Proportional to 355.54, 532.78 and 239.56

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Solution

The fourth proportional to 355.54, 532.78 and 239.56 is: 358.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.54 : 532.78 = 239.56 : x
  2. Step 2: Convert to fraction form
    355.54/532.78 = 239.56/x
  3. Step 3: Cross multiply
    355.54x = 532.78 × 239.56
  4. Step 4: Simplify right side
    355.54x = 127,630.85
  5. Step 5: Solve for x
    x = 127,630.85/355.54
  6. Step 6: Final answer
    x = 358.98

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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.