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Finding the Fourth Proportional to 358.02, 536.49 and 280.80

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Solution

The fourth proportional to 358.02, 536.49 and 280.80 is: 420.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.02 : 536.49 = 280.80 : x
  2. Step 2: Convert to fraction form
    358.02/536.49 = 280.80/x
  3. Step 3: Cross multiply
    358.02x = 536.49 × 280.80
  4. Step 4: Simplify right side
    358.02x = 150,646.39
  5. Step 5: Solve for x
    x = 150,646.39/358.02
  6. Step 6: Final answer
    x = 420.78

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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.