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Finding the Fourth Proportional to 293.67, 440.64 and 139.68

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Solution

The fourth proportional to 293.67, 440.64 and 139.68 is: 209.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.67 : 440.64 = 139.68 : x
  2. Step 2: Convert to fraction form
    293.67/440.64 = 139.68/x
  3. Step 3: Cross multiply
    293.67x = 440.64 × 139.68
  4. Step 4: Simplify right side
    293.67x = 61,548.60
  5. Step 5: Solve for x
    x = 61,548.60/293.67
  6. Step 6: Final answer
    x = 209.58

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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.