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Finding the Fourth Proportional to 355.80, 490.92 and 200.52

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Solution

The fourth proportional to 355.80, 490.92 and 200.52 is: 276.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.80 : 490.92 = 200.52 : x
  2. Step 2: Convert to fraction form
    355.80/490.92 = 200.52/x
  3. Step 3: Cross multiply
    355.80x = 490.92 × 200.52
  4. Step 4: Simplify right side
    355.80x = 98,439.28
  5. Step 5: Solve for x
    x = 98,439.28/355.80
  6. Step 6: Final answer
    x = 276.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.