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Finding the Fourth Proportional to 301.54, 451.99 and 139.09

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Solution

The fourth proportional to 301.54, 451.99 and 139.09 is: 208.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.54 : 451.99 = 139.09 : x
  2. Step 2: Convert to fraction form
    301.54/451.99 = 139.09/x
  3. Step 3: Cross multiply
    301.54x = 451.99 × 139.09
  4. Step 4: Simplify right side
    301.54x = 62,867.29
  5. Step 5: Solve for x
    x = 62,867.29/301.54
  6. Step 6: Final answer
    x = 208.49

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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.