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Finding the Fourth Proportional to 293.82, 440.71 and 139.85

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Solution

The fourth proportional to 293.82, 440.71 and 139.85 is: 209.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.82 : 440.71 = 139.85 : x
  2. Step 2: Convert to fraction form
    293.82/440.71 = 139.85/x
  3. Step 3: Cross multiply
    293.82x = 440.71 × 139.85
  4. Step 4: Simplify right side
    293.82x = 61,633.18
  5. Step 5: Solve for x
    x = 61,633.18/293.82
  6. Step 6: Final answer
    x = 209.77

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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.