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Finding the Fourth Proportional to 358.02, 536.49 and 321.21

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Solution

The fourth proportional to 358.02, 536.49 and 321.21 is: 481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.02 : 536.49 = 321.21 : x
  2. Step 2: Convert to fraction form
    358.02/536.49 = 321.21/x
  3. Step 3: Cross multiply
    358.02x = 536.49 × 321.21
  4. Step 4: Simplify right side
    358.02x = 172,325.95
  5. Step 5: Solve for x
    x = 172,325.95/358.02
  6. Step 6: Final answer
    x = 481.33

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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.