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Finding the Fourth Proportional to 355.47, 490.52 and 206.06

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Solution

The fourth proportional to 355.47, 490.52 and 206.06 is: 284.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.47 : 490.52 = 206.06 : x
  2. Step 2: Convert to fraction form
    355.47/490.52 = 206.06/x
  3. Step 3: Cross multiply
    355.47x = 490.52 × 206.06
  4. Step 4: Simplify right side
    355.47x = 101,078.57
  5. Step 5: Solve for x
    x = 101,078.57/355.47
  6. Step 6: Final answer
    x = 284.35

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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.