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Finding the Fourth Proportional to 355.03, 490.45 and 352.28

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Solution

The fourth proportional to 355.03, 490.45 and 352.28 is: 486.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.03 : 490.45 = 352.28 : x
  2. Step 2: Convert to fraction form
    355.03/490.45 = 352.28/x
  3. Step 3: Cross multiply
    355.03x = 490.45 × 352.28
  4. Step 4: Simplify right side
    355.03x = 172,775.73
  5. Step 5: Solve for x
    x = 172,775.73/355.03
  6. Step 6: Final answer
    x = 486.65

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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.