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Finding the Fourth Proportional to 293.38, 440.09 and 139.23

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Solution

The fourth proportional to 293.38, 440.09 and 139.23 is: 208.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.38 : 440.09 = 139.23 : x
  2. Step 2: Convert to fraction form
    293.38/440.09 = 139.23/x
  3. Step 3: Cross multiply
    293.38x = 440.09 × 139.23
  4. Step 4: Simplify right side
    293.38x = 61,273.03
  5. Step 5: Solve for x
    x = 61,273.03/293.38
  6. Step 6: Final answer
    x = 208.85

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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.