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Finding the Fourth Proportional to 355.38, 532.98 and 108.57

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Solution

The fourth proportional to 355.38, 532.98 and 108.57 is: 162.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.38 : 532.98 = 108.57 : x
  2. Step 2: Convert to fraction form
    355.38/532.98 = 108.57/x
  3. Step 3: Cross multiply
    355.38x = 532.98 × 108.57
  4. Step 4: Simplify right side
    355.38x = 57,865.64
  5. Step 5: Solve for x
    x = 57,865.64/355.38
  6. Step 6: Final answer
    x = 162.83

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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.