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Finding the Fourth Proportional to 355.26, 532.92 and 139.02

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Solution

The fourth proportional to 355.26, 532.92 and 139.02 is: 208.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.26 : 532.92 = 139.02 : x
  2. Step 2: Convert to fraction form
    355.26/532.92 = 139.02/x
  3. Step 3: Cross multiply
    355.26x = 532.92 × 139.02
  4. Step 4: Simplify right side
    355.26x = 74,086.54
  5. Step 5: Solve for x
    x = 74,086.54/355.26
  6. Step 6: Final answer
    x = 208.54

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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.